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Parent and teacher guide · September 2026

Decodable or levelled? What the difference means in practice

Both labels describe early reading books, but they are graded on completely different things — and the difference decides what a child can do when they get stuck. Here is how to tell them apart, including a test that works regardless of what the back cover claims.

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What a decodable reader is

A decodable reader restricts its words to letter-sound patterns the child has already been taught. If a book is decodable for your child, they can look at each word, say the sounds and blend them, without needing the picture or the sentence to supply the answer.

Decodability is therefore not a fixed property of a book. The same story is decodable for a reader who knows its sounds and not decodable for one who does not, which is why these books are usually published in stages.

What a levelled reader is

A levelled reader is graded by overall difficulty rather than by spelling patterns. Schemes differ, but the common ingredients are sentence length, how repetitive the text is, how familiar the vocabulary is, and how much the illustrations support the meaning.

Because levels are not built around taught letter-sounds, a level-appropriate book can still contain words a child has no way of sounding out yet.

The practical difference

The same page, two different demands

This is the distinction that matters at the kitchen table, rather than the terminology.

What the child does when stuck

With a decodable text, the intended move is to sound the word out, because the text was built so that this works. With a levelled text containing untaught patterns, the child has no decoding route available, so the remaining options are to guess from the picture, guess from context, or wait to be told.

A child who is still learning the code can end up practising guessing rather than decoding, simply because the book left them no alternative.

Which one, and when

  • While the code is being taught: decodable texts let a child apply what they have just learned and succeed independently.
  • Once decoding is secure: levelled and ordinary trade books matter more, because the goal shifts to fluency, vocabulary and comprehension.
  • Alongside either: reading aloud to a child from books well beyond their own decoding level does different and valuable work.

These are complementary rather than opposed. The mismatch to avoid is asking a child to read independently from a book whose spelling patterns they have not met.

How to tell which you are holding

  1. Look for a stated focus. Decodable books normally name their sounds or stage, such as "s a t p i n" or "short o".
  2. Look for a tricky-word list. Decodable series usually flag the few common words that cannot yet be sounded out.
  3. Cover the pictures and read a page yourself. If the text still works without the illustrations, it is doing the decoding work. If it collapses, the pictures were carrying it.
  4. Check for a letter or number level. A band or level with no mention of spelling patterns usually indicates a levelled scheme.

An honest caveat

Schemes vary and the labels are not standardised. "Decodable" is not a protected term, and books are sometimes marketed as decodable while still relying on untaught patterns. The cover-the-pictures test above is more reliable than the label on the back.

Programmes also introduce sounds in different orders, so a stage 2 book from one publisher will not line up with stage 2 from another. Match books to the sounds your child actually knows rather than to a number.

Try it

Six staged decodable books, free

Each names its letter-sound set, so you can match a book to what your child has been taught rather than guessing at a level.

Stage 1 · s a t p i n

Pip Sits

A six-page first read built from the first six letter sounds, including short i in words such as "tin" and "sits".

First reader
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Stage 2 · c e h r m d

Ten Red Hens

An eight-page short-e story, with a little support for tricky words and simple endings.

Short E
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Stage 3 · g o u l f b

Bug in a Cup

An eight-page short-u story that revisits familiar sounds and adds a simple consonant blend.

Short U
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See all eight readers, with printing guidance

About this guide

Disclosure: SnackPack Studios publishes the readers linked above and the learning apps connected to them. The PDFs are complete standalone resources: no account, newsletter subscription or purchase is required to download or use them at home or in a classroom.

This guide describes how the two kinds of book differ in practice. It is written for parents choosing what to put in front of a child tonight, and is not a summary of the research literature or a substitute for the guidance your child's school provides.