Literacy: From the Perspective of Text and Discourse Theory

Literacy is a critically important and contemporary issue for educators, scientists, and politicians. Efforts to overcome the challenges associated with illiteracy, and the subsequent development of literate societies, are closely related to those of poverty reduction and sustainable human development. In this paper, the authors examine literacy from the lens of text and discourse theorists who focus on the higher-order comprehension processes involved in literacy. Discourse processing models make the assumption that comprehension emerges from the construction of a mental model of the text, which relies on the reader generating inferences to connect ideas within the text and to what the reader already knows. The article provides a broad overview of the theoretical models that drive research on text comprehension and production, as well as how this research shapes literacy instruction and effective interventions. The authors focus on two interventions with proven success in improving deep comprehension and writing, iSTART and the Writing Pal. Increasing literacy across the world call for a greater focus on theory driven strategy interventions to be integrated within classrooms and community at large.

Unfortunately, these estimates suggest that approximately 750 million adults remain functionally illiterate in today's society, with particularly low literacy rates in concentrated populations in the world (UNESCO Institute for Statistics, July 2017) 1 . For example, South and Southeast Asia, the Middle East and North Africa, and Sub-Saharan Africa report basic literacy levels of around 60% (van Zanden et al., 2014). Other areas of the world report literacy rates as low as 19 percent (UNESCO, 2015). In addition, many of those who have learned to read and write, do not make active or meaningful use of their literacy skills. There are millions of individuals who are considered "literate" but who do not possess a sufficient mastery of literacy to cope with even the most elementary tasks. There are many more people throughout the world who experience problems because they are not 'functionally' literate in relation to their environment. This may include immigrants who are living in a foreign language country, people with dyslexia, or those with visual impairments who do not have access to affordable reading resources in order to be able to make use of their literacy skills. These individuals can feel handicapped in coping with modern life situations, requiring ever more sophisticated literacy skills.
What is literacy? An important caveat to this discussion of literacy rates relates to the means through which "literacy" is defined. Estimated rates of literacy vary based on the assessments used, as well as individuals' interpretations of these definitions and corresponding assessments. For example, the PIRLS international literacy benchmarks include four achievement levels (Mullis, Martin, Foy, & Drucker, 2012): low: can locate and retrieve information; intermediate: can make straightforward references; high: can make inferences and interpretations with text-based support; and advanced: can integrate ideas and in-formation across texts to provide reasons and explanations. According to these benchmarks, even the highest performing countries achieve scores of only 20% in the "advanced" category and 60% in the "high" category, and many have claimed that even these estimates may be inflated. Thus, despite claims that the majority of the world population might be considered "literate," there remains significant room for improvement in these skills.
Beyond the issues associated with literacy assessment, the very term -literacy -is used in various ways in the research literature and in practice. UNESCO defines a literate person to be someone "who can, with understanding, both read and write a short simple statement in everyday life" (UNESCO, 2008). Importantly, the word "literacy" has commonly been associated with basic, everyday reading processes (e.g., word recognition, phonics, and lexical decoding). However, reading is a complex activity that relies on a variety of processes, from recognizing letters and identifying words to processing the meaning of a full sentence and integrating textual information with prior domain knowledge. For example, Luke and Peter's (1997) "Four Literacy Resources model" specifies a set of practices in which children need to participate to become good readers: a. breaking the code of written texts; b. participating in understanding and composing meaningful written, visual and spoken texts; c. using texts functionally; and d. critically analyzing and transforming texts.
Indeed, effectively using literacy skills requires individuals to use their knowledge of the world and language, necessitating the knowledge and use of written language as a means of communication that goes beyond just breaking the code.

Text and Discourse Theories of Reading
Our objective here is to describe literacy from the perspective of text and discourse theories. Text and discourse researchers focus on the higher-order comprehension processes involved in literacy (Graesser, Gernsbacher, & Goldman, 2003;Schober, Britt, & Rapp, 2018). Take, for example, an excerpt from the Wikipedia entry on Quantum Physics: In the mathematically rigorous formulation of quantum mechanics [...] the possible states of a quantum mechanical system are symbolized as unit vectors (called state vectors). Formally, these reside in a complex separable Hilbert space -variously called the state space or the associated Hilbert space of the system -that is well defined up to a complex number of norm 1 (the phase factor).
A proficient reader may recognize the individual words or accurately parse the sentence and be able to read the passage aloud. However, these fundamental skills do not guarantee that the reader will have understood this passage, or, perhaps more importantly, be able to use or apply this information in a new situation. Unless the reader has sufficient knowledge of the domain and topic, it is virtually impossible to make sense of this text, let alone understand the deeper meaning.
Constructing a Coherent Mental Model during Reading. Discourse processing models make the assumption that comprehension emerges from the construction of a mental model of the text. A mental model consists of a network of interrelated propositions that reflect the explicit information contained within a text (e.g., Kintsch, 1988;1998). Accordingly, as a text is processed, each sentence sends out a retrieval signal that leads to the activation of semantically related propositions corresponding to prior discourse constituents and relevant prior knowledge (Myers & O'Brien, 1998). The features of sentences that serve as retrieval signals involve nouns, verbs, and derived propositions (Kintsch, 1988) as well as morphological information (e.g., cohesion cues) that signal that any given sentence is related to prior discourse constituents (Graesser & McNamara, 2011). Texts convey implicit situational relations to the prior discourse context (time, space, causality) and structural cues (comparison, descriptive, cause-effect) that also direct the reader to the need to establish relations between the current sentence and the prior context. These features are by no means uniformly represented across a text; as such, activation dynamically waxes and wanes as readers process a text (McNamara & Magliano, 2009a;Myers & O'Brien, 1998). Successful readers are sensitive to the dynamic changes of these features as they process a text. The end result of successful reading is a network of propositions (i.e., ideas) that reflects the relations derived by the reader, and ideally, those relations that were warranted by the intended structure of the texts.

LITERACY: FROM THE PERSPECTIVE OF TEXT AND DISCOURSE THEORY
The Construction-Integration Model of Comprehension. Many contemporary discourse comprehension models found their roots in the Construction-Integration model of comprehension (Kintsch, 1998) and its predecessors (Kintsch & van Dijk, 1978;van Dijk & Kintsch, 1983). The Construction-Integration model claims that readers construct multiple levels of understanding including the surface structure, textbase, and situation model levels. The surface structure contains the explicit words and sentence structures from the text. If a reader constructs a mental model that is primarily dominated by a surface structure, they will only have a memory for the explicit words in the text. In the textbase level of the model, words and syntax in the surface structure are integrated to build a mental model of the text propositions. This level represents the general ideas and concepts contained in the text, including the gist. These generalizations yield a series of propositions that may be only loosely or inaccurately interconnected. It is impossible to include all of the information and relations explicitly within a text; thus, the activation and use of background knowledge is necessary to fill in the gaps and to add structure and stability to the network of concepts.
The third level of representation is referred to as the situation model. The situation model is a higher-level representation of text that is related to semantic meaning rather than specific words. This model contains not only the information from the text itself, but also links between these concepts and a reader's prior knowledge. Therefore, to establish a coherent representation of the text, individuals must integrate aspects of their knowledge, such as lexical and domain knowledge, with information explicitly provided in the text.
It is important to note that the representation that emerges after this construction-integration process is not necessarily equally composed of text-based and knowledge-derived information. For instance, it is possible for either the textbase or situation model to dominate the final mental representation. A primary assumption of the C-I model is that deep comprehension requires readers to process texts at multiple levels. A reader's mental representation of a text is more coherent to the extent that inferences are generated to create links between concepts explicitly conveyed in the text (i.e., the textbase) and connections to prior knowledge (i.e., the situation model).
In summary, according the Construction-Integration model of comprehension, reading involves processing the words and sentences in the text, activating related concepts, and generating a situation model, wherein background knowledge and experiences are integrated into the text for a specific purpose (Kintsch, 1998). As such, text comprehension processes are goal-oriented. If the purpose of reading is to remember the sounds of the words or to memorize individual sentences, that objective may be met, but this would not reflect meaningful comprehension. By contrast, consider a reader who is trying to learn from a text. This reader attempts to make connections between ideas in the text, and to what they already know --the reader is working toward a coherent mental representation of the text (McNamara, 1997). The reader is seeking to achieve deep comprehension.
Generating Inferences is the Key to Comprehension. Coherent and durable mental models emerge through the construction of inferences (see McNamara & Magliano, 2009, for a review of comprehension models). Indeed, ssuccessful comprehension depends on inference generation (Graesser et al., 1994;Kintsch, 1998;McNamara & Magliano, 2009b). Inferences are necessary in order to integrate information from the text with prior knowledge and connecting ideas across the text. As such, general, world, and topic knowledge are crucial components to comprehension, and literacy. Readers who have more knowledge are more likely to generate inferences that connect new information to what they already know --inferences form the glue that makes information stick. Readers who know more about the topic are more likely (and able) to generate inferences that connect new information to what they already know. In turn, stronger associations between ideas make them more memorable and comprehensible. Indeed, research indicates that prior knowledge is one of the strongest predictors of comprehension success (Dochy et al., 1999;Shapiro, 2004). Readers with more prior knowledge about the topic and the world in general are able to process information more quickly, remember more information, and ignore irrelevant information (e.g., Alexander, Kulikowich, & Schulze, 1994, Bransford & Johnson, 1972Chiesi, Spilich, & Voss, 1979;McNamara & Kintsch, 1996;McNamara & McDaniel, 2004).
Promoting inference generation is key to reading strategy instruction (McNamara, 2007;Snow, 2002;Palincsar & Brown, 1984, 1986). When paraphrasing, readers attempt to restate the text in more familiar terms (i.e., putting the text in their own words), and thus they are making connections between the text and familiar terms. Predicting occurs when readers attempt to anticipate upcoming text contents though thoughtful guesswork (e.g., expecting a new term to be defined in future sentences). This is most successful for familiar text such as narratives. When bridging, readers make inferences to connect current text information to prior text information, whereas elaborating involves the use of general knowledge, domain-specific knowledge, or logical reasoning to expand upon given text information. In turn, comprehension monitoring entails readers' self-assessments of their own text understanding. It is the process of being aware of one's own understanding and thus, it generally falls out of using effective reading strategies. Readers need to be at least somewhat aware of their level of understanding to use a strategy. And, the awareness of comprehension gaps ideally leads to the use of repair strategies.
One technique for promoting the generation of inferences is self-explanation. Self-explanation is the process of overtly explaining the deeper meaning of text while reading. Explanations are generally based on information contained in the discourse context and world knowledge. Self-explanation may be spontaneous (Chi, Bassok, Lewis, Reimann, & Glaser, 1989) or in service of a specific goal (Magliano, Trabasso, & Graesser, 1999;McNamara, 2004). Students who spontaneously self-explain understand more from learning materials and construct better mental models of content (Bisra, Liu, Nesbit, Salimi, & Winne, 2018;Magliano et al., 1999;Trabasso & Magliano, 1996;VanLehn, Jones, & Chi, 1992).
Students can be taught to more effectively self-explain by leveraging active comprehension strategies during self-explanation McNamara, 2004;McNamara et al., 2004). Self-Explanation Reading Training (SERT; McNamara, 2004 is an instructional approach that leverages the benefits of self-explanation to improve students' strategic text processing and ultimately their comprehension. Students are provided with instruction and practice on how to use active reading comprehension strategies in combination with self-explanation while reading difficult expository texts. Few readers self-explain on their own and few self-explain well (Chi et al., 1994). Hence, to enhance this process, SERT combines self-explaining with five of the empirically-validated strategies: comprehension monitoring, paraphrasing, predicting, bridging, and elaborating. Students who use SERT better understand challenging science texts in comparison to students who are merely prompted to self-explain (McNamara, 2004McNamara, O'Reilly, Best, & Ozuru, 2006). Indeed, SERT is particularly effective for less skilled readers (Magliano et al., 2005) and readers who possess less relevant prior knowledge (McNamara, 2004. SERT has been implemented within the Interactive Strategy Training for Active Reading and Thinking (iSTART), a technology-based support for comprehension literacy. iSTART implements and expands SERT within a gamebased, intelligent tutoring system (ITS) framework that includes online instructional tutorials and demonstrations for comprehension monitoring, paraphrasing, predicting, bridging, and elaborating. In addition, iSTART has been recently expanded to include training on fundamental comprehension strategies including summarizing and question-asking Ruseti et al., 2018a;2018b). Across a variety of studies, iSTART has been found to facilitate self-explanation quality and reading comprehension for readers from middle school through adulthood and like SERT, is particularly helpful for low-knowledge and less skilled readers (Johnson, Guerrero, Tighe, & McNamara, 2017;Magliano et al., 2005;McCarthy, Likens, Johnson, Guerrero, & McNamara, 2018;McNamara, Levinstein, & Boonthum, 2004;Snow, Jacovina, Jackson, & McNamara, 2016).
An important component of iSTART's efficacy is that it enables multiple forms of strategy practice and feedback. First, in the coached practice module, students read a text and type self-explanations for target sentences. These explanations are automatically assessed via natural language processing (NLP) algorithms based on lexical and semantic indices. These algorithms identify the type(s) of strategies included in the students' responses, provide an overall quality score (from "0-Poor" to "3-Great"), and guide formative feedback on revising and improving their self-explanations (Jackson, Boonthum & McNamara, 2015;Jackson & McNamara, 2012;Panaite et al., 2018).
Second, iSTART also incorporates game-based practice to increase motivation and engagement (Jackson & McNamara, 2013). Generative games allow students to earn points for writing high-quality self-explanations. Identification games ask students to read example self-explanations and earn points by identifying the demonstrated strategies. Points earned in these games can be "spent" to unlock additional games and customization features (e.g., personal avatars).
More recently, iSTART has been modified to increase personalized feedback. That is, iSTART has become more adaptive. An algorithm has been implemented that selects the difficulty of future texts based on the learner's prior performance. For instance, if a student consistently generates poor-quality self-explanations for a given text, the next assigned text will be easier . This adaptivity improves learning outcomes under review) and increases students' perceptions of learning (Watanabe, McCarthy, & McNamara, 2019), particularly for less-skilled readers.

Text and Discourse Theories of Writing
Writing is also a key component of literacy. Writing is a complex activity that entails nonlinear and iterative processes of idea generation, organization, translation, and refinement (e.g., Flower & Hayes, 1981;Hayes, 2012;McNamara & Allen, 2017;Olive, 2014). Writing also requires consideration of audience knowledge, needs, interests, and objections (e.g., Kellogg, 2008;Magnifico, 2010;McNamara & Allen, 2017). Thus, perhaps unsurprisingly, researchers have documented a strong and multifaceted relationship between students' writing and reading skills (e.g., Allen, Snow, Crossley, Jackson, & McNamara, 2014;Fitzgerald & Shanahan, 2000;Graham et al., 2018;Shanahan, 2016). For instance, underlying both skilled reading and writing are fundamentals such as rich vocabulary knowledge, language fluency, and understanding of text structures and genres. In the case of reading, such knowledge enables decoding and comprehension of text. In the case of writing, the same knowledge empowers the organization and production of coherent text.
Compared to reading, there has been a lack of research and theory development on writing. There have been relatively few impactful theories of writing, and these theories have generally built upon each other, rather than approaching the process from a new lens. The most prominent model of writing defines writing as consisting of three distinct processes: planning, translating, and reviewing (Flower & Hayes, 1981;Hayes, 1996Hayes, , 2006Hayes & Flower, 1980). According to this model, planning involves idea generation and organization, as well as the setting of goals. Translation describes the act of translating ideas into written language, whereas the reviewing phase involves the evaluation and revision of the written text. The Flower and Hayes model of writing was the first to emphasize that these various writing phases were not necessarily linear (cf. Britton, Burgess, Martin, McLeod, & Rosen, 1975;Roham, 1965). Rather, writing was argued to be a dynamic activity that involved rapid and continuous shifts amongst the independent phases.
Beyond these three phases, Flower and Hayes emphasized the important role of monitoring during writing, as well as the writer's use of the task environment and long-term memory to produce text content. Later revisions of this model included the additions of working memory, motivation, and affect (Hayes, 1996(Hayes, , 2006. The task environment was further delineated to include the social environment and the physical environment. Later depictions of the model dropped the explicit specification of the three stages (planning, translating, and reviewing), and adopted a stage theory model, placing working memory as the centerpiece of the model. The construct of working memory was consistent with the Baddeley (1986) working memory model, including phonological memory, a visuospatial sketchpad, and semantic memory, and was assumed to draw upon and be influenced by motivation and affect, cognitive processes, and long-term memory.
Despite its important contribution to the field, this model remains reliant on stage-theory models of cognition, which generally rely on discrete processing components (e.g., Hayes, 1996). The cognitive approach to writing often fails to consider the underlying subskills involved in completing a task and the knowledge required to complete the task. Instead, this cognitive approach tends to focus on constructs such as working memory and self-regulation, and to some extent, problem solving.
Stage theory models that describe processes in terms of the transfer of information from long-term memory to working memory. They do not consider basic concepts accepted in cognitive science such as spreading activation and parallel processing. As such, stage theory models are outdated (MacKay, 1998). In order to progress as a field, writing theorists must consider the complexities of the writing process in terms of the underlying cognitive and social processes (e.g., Newell, Beach, Smith, & Vanderheide, 2011), as well as the parallel interplay between the various factors that influence writing.
Numerous models have been developed describe comprehension at various levels (e.g., Gernsbacher, 1997;Graesser, Singer, & Trabasso, 1994;Kintsch, 1998;Myers & O'Brien, 1998;Zwaan, Langston, & Graesser, 1995). Although these models diverge in their specific characteristics, a principle focus of the majority of contemporary models rests on the constructive and active nature of the reading process. Following this perspective, text comprehension relies not only on the prior knowledge of the reader, but importantly, also on the processes needed to capitalize on this knowledge. This critical feature of text comprehension can additionally be applied to the process of text production (Genlott & Grönlund, 2013). Indeed, we have recently argued that the information we have gleaned from years of research on the text comprehension process should be used to inform further research on writing (McNamara & Allen, 2018).

Interventions to Improve Writing
To gain writing proficiency, students must develop an understanding of core writing processes (e.g., idea generation, translation, and refinement) along with learning how to coordinate and integrate these processes (Braaksma, Rijlaarsdam, van den Bergh, & van Hout-Wolters, 2004;Olive, 2014). Educators can support such knowledge and skill acquisition through strategy-based instruction (Graham, Harris, &, Chambers, 2016;Graham & Perin, 2007;Newell et al., 2011). Importantly, students must then hone their understanding and skill with such strategies via mindful, self-regulated practice (Kellogg, 2008;Kellogg & Raulerson, 2009;Kellogg & Whiteford, 2009)  Multiple studies have demonstrated the benefits of instruction that emphasizes strategies and self-regulation (e.g., Self-Regulated Strategy Development; Graham & Perin, 2007;Graham et al., 2016;. Interventions can support writers of varying ages and abilities by communicating the underlying declarative knowledge of writing (e.g., knowledge about genres and goals) and the procedural knowledge to succeed in writing tasks (e.g., methods for composing valid arguments, organizing ideas cohesively, and elaborating). Strategy instruction interventions benefit college students (e.g., Butler & Britt, 2011;MacArthur, Philippakos, & Ianetta, 2015), middle and high school students (e.g., De La Paz & Felton, 2010; Graham & Perin, 2007), and elementary school students (e.g., De La Paz & Sherman, 2013; Ferretti, Lewis, & Andrews-Weckerly, 2009), and seem particularly helpful for students with weaker skills or learning disabilities.
With respect to practice, there are multiple approaches available including both essay-based and game-based practice (Roscoe, Allen, & McNamara, 2019). Composing and revising complete essays is the most traditional and common format. Students are typically assigned a writing prompt that asks them to explain a topic, articulate and defend a point of view, or construct a narrative. Students then submit their writing to instructors, peers, or an even automated system for grading and feedback (Dikli & Bleyle, 2014;Parr & Timperley, 2014;Patchan, Charney, & Schunn, 2009;Wingate, 2010). Across iterations of writing and revising, students ideally gain proficiency with deploying, integrating, and refining key writing strategies and skills in an authentic manner. Most automated writing evaluation (AWE) systems, such as Writing Mentor (Burstein et al., 2018), Criterion (Burstein, Tetrault, & Madnani, 2013), WriteToLearn (Foltz, Streeter, Lochbaum, & Landauer, 2013), and PEG Writing (Wilson & Czik, 2016;Wilson, Olinghouse, & Andrada, 2014) support this form of practice with moderate success (e.g., Stevenson & Phakiti, 2014;Wilson & Roscoe, 2019), The strength of essay-based practice also introduces challenges-students must enact and coordinate multiple writing processes (e.g., ideation, translation, and revising) while simultaneously trying to develop those abilities. Many novice writers are overwhelmed and disheartened. In response, game-based practice offers another path for writing strategy practice that aims to leverage the fun and enjoyment of digital games (Habgood & Ainsworth, 2011;Jackson & McNamara, 2013;Proske et al., 2014). Although games do not guarantee improved motivation (see Wouters, van Nimwegen, van Oostendorp, & van der Spek, 2013), they nonetheless can leverage learners' intrinsic enjoyment of play to encourage positive attitudes toward learning tasks (Ryan, Rigby, & Przybylski, 2006). Specifically, practice activities (e.g., generating topic sentences or constructing an outline) can be embedded within game features and narratives (e.g., building robots or solving a puzzle) to make them more engaging. Various researchers and educators have successfully incorporated digital games in writing instruction (Colby, 2017), such as motivating writing via mystery-solving narratives (e.g., Barab, Pettyjohn, Gresalfi, Volk, & Solomou, 2012;Dickey, 2011) and world-building tools (e.g., Liao, Chang, & Chan, 2018). Relative to non-game comparisons, students who write and practice with digital games demonstrate improved writing and/or writing motivation.

Overview of Writing Pal
Based on prior research and best practices for writing instruction (e.g., Graham & Perin, 2007), we have developed and tested the Writing Pal (W-Pal), an intelligent tutoring system (ITS) and automated writing evaluation (AWE) system to support adolescent writers (Crossley, Allen, & McNamara, 2016;Roscoe & McNamara, 2013;Roscoe, Allen, Weston, Crossley, & McNamara, 2014). The primary focus of this instructional tool has been argumentbased, persuasive writing. A crucial element of W-Pal's effectiveness is that it synthesizes multiple researchbased instructional approaches, including multimedia strategy instruction, game-based strategy practice, and essay writing practice with formative feedback.
To introduce core writing strategy knowledge, W-Pal includes a series of multimedia lessons in which animated characters present and demonstrate strategies for planning, drafting, and revising essays. Specifically, W-Pal lessons span eight content modules: Prewriting, Planning, Introduction Building, Body Building, Conclusion Building, Paraphrasing, Cohesion Building, and Revising. Each module comprises four to five lessons on individual strategies such as "threading" (i.e., a way to build cohesion by linking ideas across sentences) and "freewriting" (i.e., a way to generate ideas before writing). All lessons were developed based on empirical principles of multimedia design, such as spatial and temporal contiguity, pacing, and partial redundancy (e.g., Mayer, 2017;Mayer & Moreno, 2003). Evaluations have shown that students are able to recall and apply the information provided in the lessons (e.g., Roscoe, Allen, & McNamara, 2019;Roscoe, Jacovina, Harry, Russell, & McNamara, 2015;Roscoe, Novak, King, & Patchan, 2018).
The AWE core of W-Pal offers a robust system for students to compose original, prompt-based essays, rapidly receive automated summative and formative feedback, and then iteratively revise and improve their essays. Essays submitted to W-Pal receive a holistic score on a 6-point scale from 1 ("Poor") to 6 ("Great") along with actionable recommendations for improved writing and strategies based on the lessons. For example, essays that offer insufficient and vague argument support (i.e., weak body paragraphs) might receive suggestions for generating ideas and incorporating further fact-based evidence. Similarly, paraphrasing recommendations might suggest strategies for condensing and rewording sentences. Studies of writing and revising with such automated feedback have demonstrated modest yet measurable gains writing quality, and have demonstrated that students incorporate lower-level and superficial edits (e.g., spelling and wording) as well as higher-level and substantive edits (e.g., cohesion and elaboration) (McCarthy, Roscoe, Likens, & McNamara, 2019;Roscoe, Allen, Johnson, & McNamara, 2018). . W-Pal also includes a suite of educational mini-games that afford deliberate and engaging practice of individual strategies or combinations of strategies. Each module is associated with at least one game and often two or three games-nearly 40 practice games in total. For example, the Planning module includes Mastermind Outline wherein players practice creating outlines using a drag-and-drop interface, and Planning Passage wherein players take a "road trip" to practice planning the flow of their essays. Research on W-Pal games has observed that students can improve both their writing strategy knowledge and their attitudes and self-efficacy toward writing (e.g., Proske, Roscoe, & McNamara, 2014;Roscoe et al., 2019;Roscoe, Brandon, Snow, & McNamara, 2014). Whereas practice and feedback in writing essays is helpful for relatively skilled students, lessskilled students tend to gain more from game-based writing practice which can break the task up into more tangible tasks within a motivating context ).

Discussion
In this paper, we have discussed comprehension and writing from the perspective of text and discourse theories. One important consideration we have conveyed is that prior knowledge, and the use of knowledge and common sense is key to comprehension. It is important to note, however, that prior knowledge is not always beneficial. Students often possess inaccurate information, or misconceptions (Vosniadou & Brewer, 1992). Misconceptions are resistant to change (Alvermann, & Smith, & Readence, 1985) and can interfere with accurate mental model construction (Feltovich, Coulson, & Spiro, 2001;Kendeou & van den Broek, 2005). Prior knowledge is also not a unidimensional construct. The nature of a reader's prior knowledge, or how that knowledge is assessed can impact the relation between prior knowledge and comprehension performance (Alexander, Kulikowich, & Schulze;McCarthy et al., 2018).
Our attempt here has been to emphasize that literacy is multidimensional. Literacy entails more than simply decoding words and sentences when reading, and requires more than correct spelling and grammatical sentences when writing (Fugelsang, 1982). Literacy has multiple aspects and consequences, including health (Berkman, Sheridan, Donahue, Halper, & Crotty., 2011;Ratzan & Parker, 2000).
A literate individual engages in complex, higher-order processes of comprehension and sense-making. Literacy involves multiple layers, including words and phrases, as well as the deeper meaning embedded within social and communicative context. Literacy is by definition a social activity: reading and writing are culturally defined social activities. Literacy involves reading and writing, as well as other skills such as the ability to process graphics, numbers, multimedia, and social media.). Tutoring technologies such as iSTART and W-Pal enhance literacy because they are adaptive to the individual, focus on multiple levels of comprehension and writing, and provide automated summative and formative feedback based on theories of text and discourse. However, they are only effective to the extent that they are part of a community of learners, integrated within a social, communicative context, for purposeful, goal-directed activities. Text and discourse inherently represent values and views. We learn reading and writing through social relations, with parents, teachers, friends, media, and so on. As such, literary activities in classrooms and the community are crucial.