Graded Reader

A book written or adapted specifically for language learners, with vocabulary and grammar controlled to match a particular proficiency level. Graded readers are the primary resource for extensive reading programmes and a key vehicle for comprehensible input and incidental vocabulary acquisition.

Definition

Nation (2001, p. 150): graded readers are "books that have been specially written or adapted for learners of English as a second or foreign language" with controlled vocabulary, grammar, and text length. They are graded into levels, typically from beginner to upper-intermediate, with each level introducing a defined number of headwords.

Day and Bamford (1998) position graded readers as the essential tool for extensive reading: the means by which learners can access large quantities of comprehensible, enjoyable text at their level.

Structure of Grading Systems

Major publishers use headword-based levelling:

Publisher	Series	Levels	Headword Range
Oxford	Oxford Bookworms	Starter–Stage 6	250–2,500
Penguin/Pearson	Penguin Readers	Level 1–7	200–3,000
Cambridge	Cambridge English Readers	Starter–Level 6	250–3,800
Macmillan	Macmillan Readers	Starter–Upper	300–2,200
National Geographic	Footprint Reading Library	8 levels	800–3,000

Headwords are base forms: "run" counts as one headword covering "runs", "running", "ran". Most series align approximately with CEFR levels (A1–B2).

Key Distinctions

Simplified vs Original

• Simplified: Classics or non-fiction rewritten with controlled language (e.g., a Dickens novel retold at 1,000 headwords)
• Original: Stories written specifically for language learners at a given level, with no source text to simplify

Fiction vs Non-Fiction

Most graded readers are fiction (adventure, romance, crime, classics), but non-fiction readers (biography, science, history) are increasingly available and valuable for academic English contexts.

Graded Readers vs Authentic Texts

Feature	Graded Reader	Authentic Text
Vocabulary control	Yes: defined headword level	No
Grammar control	Yes: limited structures per level	No
Coverage threshold	~98% known words	Variable, often <95% for lower-level learners
Reading fluency	Supported	Often disrupted by unknown language
Cultural authenticity	Varies	High

The 98% Coverage Principle

Nation (2001) and Hu and Nation (2000) established that learners need to know approximately 98% of the running words in a text for unassisted comprehension and pleasure reading. At 95% coverage (1 unknown word in 20), reading becomes laborious. Graded readers are specifically designed to ensure this 98% threshold is met at each level.

This principle connects directly to frequency-based vocabulary lists like the BNC COCA Headword Lists (2K 3K 4K): a learner who knows the most frequent 2,000 word families can read graded readers at approximately Stage 3–4 of most series.

Why Graded Readers Matter for ELT

1. Massive comprehensible input: Graded readers provide the large volume of input that extensive reading research shows is necessary for acquisition (Krashen, 2004)
2. Incidental vocabulary learning: Nation (2001) estimates learners pick up roughly 1 word in 20 unknown words encountered through reading, but only if 98% is already known
3. Reading fluency development: Repeated exposure to known vocabulary in varied contexts builds automaticity and reading speed
4. Motivation and pleasure: Self-selected, level-appropriate reading builds positive attitudes toward reading in L2
5. Grammar consolidation: Encountering structures repeatedly in meaningful context reinforces acquisition beyond explicit instruction

Research Evidence

Day and Bamford (1998) synthesise research showing extensive reading with graded readers leads to:

• Improved reading speed and fluency
• Increased vocabulary size
• Better writing quality
• Greater motivation and positive attitudes toward reading
• Improved overall language proficiency

Waring and Takaki (2003) found that vocabulary gains from graded reader reading were modest per text but cumulative across sustained reading programmes.

Nation (2015) estimates learners need to read approximately one graded reader per week to see significant vocabulary growth, reinforcing the importance of volume.

Practical Implementation

• Class library: Build a collection across levels; allow free choice
• Level matching: Use placement tests or the "five-finger rule" (more than 5 unknown words per page = too hard)
• No comprehension tests: Following Day and Bamford's principles, avoid testing comprehension because it kills the pleasure that drives volume
• Reading logs: Simple records (title, date, brief reaction) track volume without adding burden
• Book talks: Brief peer recommendations create a reading community

References

• Day, R.R. & Bamford, J. (1998). Extensive Reading in the Second Language Classroom. Cambridge University Press.
• Nation, I.S.P. (2001). Learning Vocabulary in Another Language. Cambridge University Press.
• Nation, I.S.P. (2015). Principles guiding vocabulary learning through extensive reading. Reading in a Foreign Language, 27(1), 136–145.
• Hu, M. & Nation, I.S.P. (2000). Unknown vocabulary density and reading comprehension. Reading in a Foreign Language, 13(1), 403–430.
• 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.
• Krashen, S. (2004). The Power of Reading (2nd ed.). Libraries Unlimited.

See Also

• Sustained Silent Reading: the pedagogical approach graded readers serve
• Comprehensible Input: Krashen's i+1 principle that graded readers operationalise
• Incidental Learning: vocabulary acquired without explicit study through reading
• BNC COCA Headword Lists (2K 3K 4K): frequency lists that underpin grading systems