In short
- The clearest gain is reading rate: pupils who read a lot of easy text learn to read faster without losing comprehension.
- Comprehension and vocabulary improve too, but vocabulary grows slowly and needs many books, not one.
- Learners tend to feel more comfortable and less anxious about reading, though this has been studied mainly with university students.
- Effects on writing and speaking are less certain, so extensive reading should sit alongside the teaching of those skills, not replace it.
Teachers and parents often hear that extensive reading is good for pupils. That is true, but it helps to know which gains are well supported and which are only hopeful. This article sets out what pupils gain from reading large amounts of easy text: speed, comprehension, vocabulary and attitude. For each one it says how strong the evidence is and names the key study. It ends with the areas where the evidence is thinner, and with a way to explain all of this to parents.
What are the benefits of extensive reading?
Extensive reading means reading large amounts of easy, self-chosen text for meaning. Its main benefits are faster reading, better comprehension and, over time, a larger vocabulary. Many learners also become more comfortable readers. The clearest evidence is for reading rate. The weakest is for writing and speaking, which few studies have measured closely.
Meta-analyses, which combine the results of many studies, support the core claim. Jeon and Day (2016) pooled 49 studies with 5,919 participants and found a small to medium average effect on reading. The table below sums up each benefit in one line.
| Benefit | How strong the evidence is | Key study |
|---|---|---|
| Faster reading (reading rate) | Good. The largest average effect in the meta-analysis, though based on only ten samples | Beglar, Hunt and Kite (2012); Jeon and Day (2016) |
| Reading comprehension | Good. Positive across many studies, including one with primary pupils | Elley and Mangubhai (1983); Jeon and Day (2016) |
| Vocabulary | Moderate. Gains are real but slow, and most new words from one book are forgotten | Waring and Takaki (2003); Jeon and Day (2016) |
| Attitude to reading | Promising. Clear in one study, with university students | Yamashita (2013) |
| Writing | Mixed. Gains reported in a few older studies | Hafiz and Tudor (1989); Elley and Mangubhai (1983) |
| Speaking | Weak. Little direct evidence either way | Elley and Mangubhai (1983) |
For the full research picture, with samples, effect sizes and weaknesses, read Does Extensive Reading Actually Work? The Evidence. This article stays with what the findings mean for pupils.
Faster, more fluent reading
Reading rate is how many words a reader gets through in a minute while still understanding. It matters more than it sounds. At 60 words a minute, a 2,000-word story takes over half an hour. At that pace it is hard to keep hold of the plot.
Beglar, Hunt and Kite (2012) followed 97 first-year Japanese university students for a year. One group did intensive reading, the close study of short texts. Three groups did pleasure reading. All three pleasure reading groups gained more reading speed than the intensive group, and the two groups that read most gained most.
Two details matter for teachers. First, comprehension stayed high, so the extra speed did not come at its expense. Second, reading a book every two weeks or more gave most learners the best gains, and simplified texts gave bigger gains than unsimplified ones.
Jeon and Day (2016) found that reading rate had the largest average effect of the three outcomes they measured (d = 0.83). They add a warning: the figure rests on only ten samples, and its difference from the other outcomes was not statistically significant.
Better reading comprehension
The landmark school study is Elley and Mangubhai (1983). In eight rural schools in Fiji, Year 4 and Year 5 pupils received 250 high-interest, illustrated story books in English. They read for about 30 minutes a day, in place of the structured drills of the usual English program. Four other schools kept the drills.
The pupils with books progressed in reading and listening comprehension at twice the rate of the others. After eight months, both book groups had gained about 15 months in reading level on a Year 4 test. The control group had gained about six and a half months.
Across many studies, Jeon and Day (2016) found an average effect of d = 0.54 on reading comprehension. That is a moderate effect. It is worth having, but it builds over months of reading, not over a few lessons.
Vocabulary: real gains, but slow
Vocabulary is the benefit most often promised and most often misunderstood. Pupils do pick up words from reading. They pick up far fewer from any one book than teachers hope.
Waring and Takaki (2003) gave 15 Japanese learners of intermediate level or above a 400-headword graded reader. They tested 25 target words that appeared between once and about 18 times in the book. Most of the words were not learned. On average, learners remembered the meaning of only one word in 25 three months later. No word met fewer than eight times was remembered.
Their conclusion is not that reading fails. It is that one book is not enough, and that a massive amount of graded reading is needed to build new vocabulary. They also suggest judging graded readers by how they deepen words learners already know, not only by new words.
Jeon and Day (2016) found a smaller average effect on vocabulary (d = 0.47) than on reading rate. For how many meetings a new word needs before it sticks, see How Many Times Must a Learner Meet a Word?
A more positive attitude to reading
Attitude is easy to overlook because it is hard to test. Yet a pupil who feels at ease with English text is likely to read more, and the other gains in this article depend on reading more.
Yamashita (2013) measured the reading attitudes of 61 Japanese university students before and after an extensive reading course. Afterwards, students reported more comfort when reading and saw more intellectual value in it. Their anxiety about reading went down. Their view of its practical value did not change.
That is one study of young adults, so treat it as promising for school pupils rather than proven. Why enjoyment matters so much for how much pupils read is covered in the benefits of reading for pleasure.
What is less clear: writing and speaking
Here the honest answer is that we know less. Jeon and Day (2016) looked only at reading comprehension, reading rate and vocabulary. Their results say nothing about writing or speaking.
Some studies do report writing gains. Hafiz and Tudor (1989) ran a three-month extensive reading program with learners of English as a second language in England. They found a marked improvement in language skills, especially in writing. It was a short study and is now over thirty years old.
Elley and Mangubhai (1983) tested writing and oral language in Fiji too. After eight months, the differences favoured the book groups but were too small to be significant. By the second year, the writing gap had become significant as well. For speaking, direct evidence remains thin.
In practice, that suggests three habits:
- Keep teaching writing directly. Reading gives pupils models, but they still need practice in producing text.
- Keep speaking practice in class. Do not expect reading alone to build it.
- Use the reading as input for both. Pupils can retell a story, write a new ending or recommend a book aloud.
Why the benefits depend on how much pupils read
The gains above depend on volume. In Beglar, Hunt and Kite (2012), the groups that read most gained most speed. Waring and Takaki (2003) concluded that vocabulary needs a massive amount of reading. A few books a term is unlikely to be enough.
Volume depends on ease, choice and time. In practice, four conditions keep pupils reading:
- Easy books. Pupils should know almost every word on the page. How to Match Students to the Right Graded Readers explains how to check.
- Real choice. Pupils pick from books at their level and may drop one they dislike.
- Regular time. A fixed slot in the timetable, plus reading at home.
- Light follow-up. A reading record or a short chat, not a test on every book.
How to explain the benefits to parents
Parents often expect English homework to look hard, so easy reading can look like a waste of time. A short, honest note helps. Promise only what the evidence supports.
Example: a note home (adapt it to your class)
This term your child will read short English stories at an easy level, for about fifteen minutes a day.
Easy is the point. Pupils who read a lot of easy text learn to read faster, and they still understand what they read.
New words build up slowly, over many books, so please do not test your child on every word.
Ask about the story instead: who was in it, and what happened at the end?
Writing and speaking are still taught in class. Reading supports them but does not replace them.
Notice what the note leaves out. It does not promise quick vocabulary gains or better speaking. A parent who later sees a child reading faster and with more confidence will trust the next note too.
How iRead handles this
In iRead, a pack is a CEFR-levelled set of stories, and each story is a graded reader. Many stories have an audio read-along synced to the text. Four word games are rebuilt each day from the vocabulary of the story the class is reading, and a quiz on the story runs after every session. Students keep a Reading Passport, one record of their reading. School leaders see levels reached, words retained and stories completed, by class, grade and term.
The core principle: Extensive reading reliably makes pupils faster and more confident readers. Vocabulary grows only with a great deal of reading, and writing and speaking still need their own teaching.
See it in iRead: iRead packs are CEFR-levelled sets of stories, many with an audio read-along synced to the text. Every story, quiz and game is levelled from A1 to C2.
See the iRead programKey takeaway
Promise parents and leaders what the evidence supports: faster reading, better comprehension and, over many books, more vocabulary. Then protect the volume of easy reading that all of those gains depend on.
Frequently asked questions
What is the main benefit of extensive reading?
The clearest benefit is reading rate. Pupils who read a lot of easy text learn to read faster while still understanding it. Beglar, Hunt and Kite (2012) found this over one year with Japanese university students, and the groups that read the most gained the most.
Does extensive reading improve vocabulary?
Yes, but slowly. Waring and Takaki (2003) found that learners remembered the meaning of only about one new word in 25 from a single graded reader three months later. Vocabulary grows through many books, in which the same words come back again and again.
Does extensive reading improve writing and speaking?
The evidence is weaker. Hafiz and Tudor (1989) reported writing gains after a three-month program in England, and writing improved by the second year of the Fiji study. Speaking has little direct evidence. Keep teaching both skills directly, and use the reading as input.
Why is extensive reading important if pupils already study English in class?
Lessons usually study short texts closely. Extensive reading adds what lessons cannot easily give: hundreds of pages of easy text in which known words and patterns come back again and again. That repetition is what makes reading fast and comfortable.
How long before the benefits of extensive reading show?
Jeon and Day (2016) found similar average effects for programs shorter than five months and for longer ones, though few long studies exist. In Fiji, Elley and Mangubhai (1983) saw clear reading gains after eight months. Plan for at least a term before judging.
Sources
- Jeon, E.-Y., & Day, R. R. (2016). The effectiveness of ER on reading proficiency: A meta-analysis. Reading in a Foreign Language, 28(2), 246-265. doi.org/10.64152/10125/66901
- Beglar, D., Hunt, A., & Kite, Y. (2012). The effect of pleasure reading on Japanese university EFL learners' reading rates. Language Learning, 62(3), 665-703. doi.org/10.1111/j.1467-9922.2011.00651.x
- Elley, W. B., & Mangubhai, F. (1983). The impact of reading on second language learning. Reading Research Quarterly, 19(1), 53-67. doi.org/10.2307/747337
- Waring, R., & Takaki, M. (2003). At what rate do learners learn and retain new vocabulary from reading a graded reader?. Reading in a Foreign Language, 15(2), 130-163. doi.org/10.64152/10125/66776
- Yamashita, J. (2013). Effects of extensive reading on reading attitudes in a foreign language. Reading in a Foreign Language, 25(2), 248-263. doi.org/10.64152/10125/66872
- Hafiz, F. M., & Tudor, I. (1989). Extensive reading and the development of language skills. ELT Journal, 43(1), 4-13. doi.org/10.1093/elt/43.1.4