Literacy Instruction

Literacy instruction is the teaching of the skills that let children decode words and understand and evaluate what they read. The evidence here comes mostly from correlational studies of which component skills (phonological and morphological awareness, decoding, vocabulary, working memory, attention) predict word reading and comprehension in primary school, plus one long-term preschool intervention and studies of older readers evaluating online texts and coping with remote study.

Reading comprehension is not one skill, so knowing which sub-skills matter at which stage tells teachers what to target. These studies also clear up a common mix-up: a skill that predicts reading in a survey is not proof that training that skill will improve reading.

Claim ledger

What the evidence shows

Drawn from 8 studies in this library. Mix labels say which citation roles are present; they are not a strength score. Supports means evidence for a finding; Challenges means evidence against a stated position; Qualifies marks scope.

• ● Supporting studies only

  Knowing many words, and knowing them well, goes with understanding texts better even among children who can already decode.

  Vocabulary knowledge adds a large share of explained variance in reading comprehension beyond decoding, memory and reasoning: in 292 Dutch fourth graders the vocabulary measures added about 30% (65% total explained), with written vocabulary breadth carrying the most unique variance (8%).

  2 supporting · 1 qualifying

  Supports

  1. 1Which kinds of word knowledge help children understand what they read?
  2. 2Why do bilingual kids lag in reading comprehension?

  Qualifies

  1. 1Which kinds of word knowledge help children understand what they read?— single-time-point cross-sectional design; no listening-comprehension measure was included

  Study comparison

  Study	Role	Design	N	Population	Outcome
  Which kinds of word knowledge help children understand what they read?2017	Supports	Cross-sectionalOne-time battery of 13 tests in 11 Dutch primary schools; hierarchical regression plus full-vs-reduced model comparisons	N=292 · 292 children tested at the start of fourth grade (147 boys, 145 girls); all in the regression	Dutch fourth graders from 11 urban and suburban primary schools	Composite reading-comprehension score from four tests (short passages, national Cito scale, PIRLS narrative and expository texts)
  Why do bilingual kids lag in reading comprehension?2018	Supports	Cross-sectionalSingle-time-point testing of Dutch fourth graders with multigroup path analysis comparing first-language (L1) and second-language (L2) readers	N=178 · 178 fourth graders (102 bilingual); first-language vocabulary available for a subgroup of 56 bilingual children	Fourth-grade children in ten classrooms across seven schools in cities in the south of the Netherlands, monolingual Dutch and bilingual (mainly Turkish, Moroccan Arabic, Berber)	Dutch reading comprehension (cloze text task), with vocabulary, decoding, syntactic integration, working memory and inhibition as predictors

• ● Supporting studies only

  General cognitive skills help comprehension by supporting the core language and decoding skills.

  Working memory and attention seem to reach reading comprehension indirectly, through word reading, listening comprehension or sentence-level (syntactic) integration, rather than directly.

  2 supporting · 1 qualifying

  Supports

  1. 1Do memory and attention matter more for listening or reading?
  2. 2Why do bilingual kids lag in reading comprehension?

  Qualifies

  1. 1Do memory and attention matter more for listening or reading?— US grades 1-3 cohort with path models; attention measured only by adult ratings

  Study comparison

  Study	Role	Design	N	Population	Outcome
  Do memory and attention matter more for listening or reading?2018	Supports	CohortConcurrent multilevel regressions and path models in grades 1-3, plus a two-year longitudinal path model from grade 1 to grade 3, drawn from a larger longitudinal reading study.	N=370 · 370 children in 121 classrooms for the concurrent analyses (125 in grade 1, 123 in grade 2, 122 in grade 3); the 125 grade 1 children were followed to grade 3 for the longitudinal model.	Typically developing US children in grades 1-3 recruited through schools at four university sites.	Passage-based reading comprehension and listening comprehension scores.
  Why do bilingual kids lag in reading comprehension?2018	Supports	Cross-sectionalSingle-time-point testing of Dutch fourth graders with multigroup path analysis comparing first-language (L1) and second-language (L2) readers	N=178 · 178 fourth graders (102 bilingual); first-language vocabulary available for a subgroup of 56 bilingual children	Fourth-grade children in ten classrooms across seven schools in cities in the south of the Netherlands, monolingual Dutch and bilingual (mainly Turkish, Moroccan Arabic, Berber)	Dutch reading comprehension (cloze text task), with vocabulary, decoding, syntactic integration, working memory and inhibition as predictors

• ● Supporting studies only

  Sound awareness is a key early bottleneck, and its role shrinks once reading is fluent.

  Phonological awareness matters most for weaker and beginning readers: in low-SES French first graders phonemic awareness was the only direct link to word reading, and among Australian 9-12-year-olds it explained much of dysfluent readers' nonword decoding but predicted nothing in fluent readers.

  2 supporting · 1 qualifying

  Supports

  1. 1Which spoken-language skills help poor kids start reading?
  2. 2Does sounding out words still matter once kids read fluently?

  Qualifies

  1. 1Does sounding out words still matter once kids read fluently?— small subgroups, so null results in fluent readers may reflect low power

  Study comparison

  Study	Role	Design	N	Population	Outcome
  Which spoken-language skills help poor kids start reading?2018	Supports	Cross-sectionalSingle-timepoint battery of oral language and reading tests analysed with exploratory graphical modelling followed by structural equation models	N=703 · 703 first-graders from 30 classes in French Priority Education Area schools, tested once in November of Grade 1	French first-grade children (about 6 years old) from low socio-economic status families	Word reading and pseudoword reading (decoding) fluency and their links to listening comprehension, vocabulary, phonemic awareness and morphological awareness
  Does sounding out words still matter once kids read fluently?2017	Supports	Cross-sectionalChildren in Grades 4 to 6 completed standardized phonological awareness and reading tests at school; they were split into thirds by reading fluency and compared with ANOVA and per-group regressions.	N=124 · 124 children after exclusions; each fluency group had roughly 38 to 47 children.	Australian primary school children in Grades 4 to 6	Reading fluency, phonological decoding, visual word recognition, reading rate and comprehension

• ● Supporting studies only

  Word-structure knowledge seems to feed comprehension more than decoding.

  Morphological awareness (knowledge of prefixes, suffixes and compounds) relates to reading mainly through oral language, and a 17-week preschool morphology programme in Norway was followed by better Grade 6 reading comprehension than a control group (effect size about .72) but not better word reading.

  2 supporting · 1 qualifying

  Supports

  1. 1Does teaching preschoolers word parts help reading years later?
  2. 2Which spoken-language skills help poor kids start reading?

  Qualifies

  1. 1Does teaching preschoolers word parts help reading years later?— quasi-experimental with a non-random control group, heavy attrition by Grade 6 and ceiling effects that may inflate the effect size

  Study comparison

  Study	Role	Design	N	Population	Outcome
  Does teaching preschoolers word parts help reading years later?2016	Supports	OtherQuasi-experimental preschool intervention: teachers randomly assigned to morphological or phonological training, non-random control group, followed up to Grade 6	N=269 · 269 children in the original study (analysed with full-information maximum likelihood); 115 were retested in Grade 6	Norwegian-speaking children aged 5-6 in their last preschool year	Word reading and reading comprehension at end of Grade 1 and Grade 6
  Which spoken-language skills help poor kids start reading?2018	Supports	Cross-sectionalSingle-timepoint battery of oral language and reading tests analysed with exploratory graphical modelling followed by structural equation models	N=703 · 703 first-graders from 30 classes in French Priority Education Area schools, tested once in November of Grade 1	French first-grade children (about 6 years old) from low socio-economic status families	Word reading and pseudoword reading (decoding) fluency and their links to listening comprehension, vocabulary, phonemic awareness and morphological awareness

• ○ Limited citations

  Choosing the trustworthy source is not the same as understanding why it is trustworthy.

  Adolescents can rank online texts by credibility more easily than they can justify those rankings: 73 Finnish 16-17-year-olds mostly ordered the texts correctly but averaged only about 20 of 48 points on written justifications, and time spent on the task was the best predictor of justification quality.

  1 supporting · 1 qualifying

  Supports

  1. 1How do teens judge if online health articles are trustworthy?

  Qualifies

  1. 1How do teens judge if online health articles are trustworthy?— small cross-sectional sample from high-performing schools, using fictitious texts

• ○ Limited citations

  Reading problems do not end at school, and format changes can hit these students harder.

  Reading difficulties can carry over into university study: in an online survey at the University of Warsaw during early COVID-19 remote learning, students with diagnosed or self-reported reading difficulties reported more stress and organisational problems and were more likely to report failing at least one exam than peers.

  1 supporting · 1 qualifying

  Supports

  1. 1Remote learning and university reading difficulties

  Qualifies

  1. 1Remote learning and university reading difficulties— self-report cross-sectional survey at one university; cannot show remote formats caused the failures

Debates

Tensions and limits

Some items are genuine disagreements on the same question. Others mark different assays, populations, or outcomes.

Timeline

How understanding moved

Study years are when the paper was published. Evidence edits are dated changes to this page's claims. Explanations are when PaperFren added a Discovery — not a claim that the science happened that day.

Papers

8 studies in this library bear on Literacy Instruction, ordered by citations.

• Do memory and attention matter more for listening or reading?

  Young children's working memory and attention mattered somewhat more for understanding spoken stories than written ones, and they helped reading comprehension mainly by supporting word reading and listening skills.

  Reading and writing · 2018 · 17 citations

• Does teaching preschoolers word parts help reading years later?

  Children taught to notice word parts (prefixes, suffixes, compounds) in preschool understood texts better six years later than untrained children.

  Reading and writing · 2016 · 15 citations

• Why do bilingual kids lag in reading comprehension?

  Bilingual children read words as fast as monolinguals but understand texts less well, mainly because their vocabulary in the school language is smaller, and the same skills drive comprehension in both groups.

  Reading and writing · 2018 · 13 citations

• Which spoken-language skills help poor kids start reading?

  In children just starting to read, spoken-language skills like vocabulary and word-structure knowledge were linked to reading only indirectly, through listening comprehension and sound awareness.

  Frontiers in psychology · 2018 · 13 citations

• Does sounding out words still matter once kids read fluently?

  Phonological awareness predicted several reading skills in struggling readers but predicted none of them in children who already read fluently.

  Frontiers in psychology · 2017 · 13 citations

• Which kinds of word knowledge help children understand what they read?

  Knowing more words, knowing them more deeply, and having strongly linked word meanings each separately helped fourth graders understand texts, with written vocabulary size mattering most.

  Reading and writing · 2017 · 10 citations

• Remote learning and university reading difficulties

  University students with formal or self-reported reading difficulties reported more remote-learning stress and were more likely than peers to fail at least one exam in the first COVID remote semester.

  Education and information technologies · 2021 · 8 citations

• How do teens judge if online health articles are trustworthy?

  High school students can easily identify which online health texts are untrustworthy, but they struggle to explain the reasons behind their judgments.

  Education and information technologies · 2022 · 3 citations

Questions

What is still open

1. The usual 'decoding first' view puts pseudoword decoding before word reading, but a graphical model of French first graders placed word reading before pseudoword reading, while the Australian study treats nonword decoding as the skill phonological awareness supports most in weak readers.

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2. The Norwegian intervention found a lasting comprehension benefit after morphology training, but the morphology and phonology groups did not differ significantly from each other, and the French correlational study found morphology linked to reading only indirectly, so how much morphology training specifically adds is unsettled.

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