Phonics vs Sight Words: Do You Need Both?

By Snappy Reading Team · Published October 16, 2026

If you have ever wondered whether to teach your child phonics or sight words, here is the short answer: that is not actually a choice you need to make. Phonics is the engine that powers nearly all word reading. High-frequency words (the ones that appear on sight-word lists) are a small set of common words your child needs quick access to. Research shows these two things work together, not against each other.

What are “sight words” — and is that the right term?

The phrase “sight words” usually refers to lists like the Dolch list or the Fry list: collections of common English words (“the”, “and”, “said”, “have”) that appear so often in books that children need to read them quickly and automatically.

Here is where it gets interesting. The term “sight words” implies these words must be memorised by their visual shape: just look at it until it sticks. But that is not how the brain actually stores words.

Dr Linnea Ehri’s orthographic mapping research shows that every word a fluent reader recognises automatically has been stored in memory through a phonics-based process — a connection between the word’s sounds and its spelling. That holds for “the” and “said” just as much as for “cat” and “jump.” The real distinction is not sight words vs phonics words: it is regular words vs irregular ones.

Where does the debate come from?

The phonics-vs-sight-words argument grew out of the “reading wars” of the late twentieth century, when whole-language approaches (which emphasised memorising words as visual units and using pictures to guess) competed with systematic phonics instruction.

The evidence eventually resolved the methodological debate. The National Reading Panel (2000), reviewing more than 100,000 studies on reading, concluded that systematic, explicit phonics instruction is the single most effective approach for teaching children to decode. Yet the debate persists, largely because the word “sight words” still carries the implication of visual memorisation.

A cleaner frame is high-frequency words: the words that appear most often in children’s books, some of which are fully phonically regular, some mostly regular, and a small number genuinely tricky.

Are most “sight words” already decodable?

Many more than people realise. A 2024 study by Miles, Eide, and Butler in Reading Psychology analysed the entire Dolch word list — the most widely used sight-word resource in early education — and found that a substantial proportion of its words follow standard grapheme-phoneme correspondences. Words like “at”, “it”, “up”, “can”, “get”, “big”, and “his” are perfectly decodable. They appear on sight-word lists not because they are irregular, but because they are so common that children need to read them quickly.

Similarly, a 2024 article by Green, Keogh, and Prout in The Reading Teacher introduced a new high-frequency wordlist built from over 2,000 children’s picture books and argued that existing sight-word resources are methodologically dated — reinforcing the case for treating high-frequency words through an orthographic lens rather than a memorisation one.

The table below sorts common high-frequency words by type:

This matters practically. If your child has solid phonics foundations, they can decode and permanently store most high-frequency words the same way they would any other word. No flashcard drilling required for the majority of the list.

What does the research say about teaching the tricky ones?

For genuinely irregular words, the question becomes: what is the most effective teaching method?

A 2022 study by Colenbrander and colleagues at Macquarie University, published in Scientific Studies of Reading, tested three methods with kindergarteners: a look-and-say whole-word approach, a look-and-spell approach (adding copying), and a mispronunciation-correction method, in which children first decoded each word using its letter sounds — even where that produced a non-standard pronunciation — and then connected it to the word’s real pronunciation. Children who actively engaged with the letters and sounds of irregular words learned them more accurately than those taught to memorise the whole-word shape.

In other words: even for the truly tricky words, going through the sounds rather than around them is the more reliable path. The brain needs something to anchor the spelling to, and phonics knowledge is that anchor.

How should parents approach this at home?

The practical answer, shaped by structured literacy principles, breaks down into three moves:

First, teach phonics systematically. Letter-sound correspondence, blending, and decoding are the foundation. A child who can blend sounds fluently will pick up most high-frequency words naturally in the course of regular reading practice, with no additional drilling.

Second, stop separating decodable words from “sight words.” When your child meets “can” or “it” in a book, encourage them to sound it out. Do not redirect them to memorise it by shape. These words are fully decodable, and the brain files them more durably through decoding than through visual repetition.

Third, use a “decode-then-bridge” approach for the genuinely irregular ones. Take “said”: ask your child to sound out what they can (the /s/ and /d/ are perfectly regular at the beginning and end). Then say: “The middle vowel is the surprise here. It says /e/.” This technique anchors the irregular part to the regular scaffolding around it, making the word far easier to retain than a whole-shape flashcard would.

The rule of thumb: the number of words that truly need to be memorised as whole units is small. Literacy researcher Tim Shanahan suggests it should be tiny. Phonics instruction handles the rest.

If your child is building both phonics skills and a growing bank of common words, Snappy can support them — practising one sound at a time, with feedback the moment they connect a letter to a sound.

FAQ

What is the difference between phonics and sight words?

Phonics teaches children how letters map to sounds so they can decode any unfamiliar word. “Sight words” is the traditional name for common words that early readers need to recognise quickly. Research shows most of these words are already phonically regular and should be decoded, not memorised by shape.

Should I be teaching my child sight words or phonics?

Start with phonics. Use high-frequency word practice as a supplement for the small number of genuinely irregular words. A child with strong phonics skills will learn even irregular words faster, because their brain can hook the spelling to the sounds they already know.

Which sight words are truly irregular?

The most common truly irregular words include “said”, “was”, “of”, “the”, “one”, “two”, “come”, “some”, “have”, and “are”. Even these have partly-regular parts: in “said”, the ‘s’ and ‘d’ follow standard phonics. Only the vowel is the surprise.

How many sight words should my child know by age five?

There is no single target figure, and counting memorised words is less important than building phonics foundations. A child with solid letter-sound knowledge will pick up high-frequency words quickly through regular reading practice, including the irregular ones.

Reviewed against: Ehri, L. C. (2014). Orthographic mapping in the acquisition of sight word reading, spelling memory, and vocabulary learning. Scientific Studies of Reading, 18(1).; Colenbrander, D. et al. (2022). Teaching children to read irregular words: A comparison of three instructional methods. Scientific Studies of Reading, 26(6), 545–564.; Miles, K. P., Eide, D., & Butler, J. R. (2024). The regularity of high-frequency words (sight words): Teacher phonetic knowledge is key. Reading Psychology, 45(8), 832–852.; Green, C., Keogh, K., & Prout, J. (2024). The CPB sight words: A new research-based high-frequency wordlist for early reading instruction. The Reading Teacher, 78(1), 56–64.; National Reading Panel (2000).