Orthographic mapping: how children learn words by sight

What is orthographic mapping?

It is the process that turns a word your child has to sound out into a word they just know. The term comes from Linnea Ehri, a researcher who has studied word reading for more than forty years. Orthographic means to do with spelling. Mapping means linking one thing to another.

So orthographic mapping is linking the spelling of a word to its sounds and its meaning. Once that link is made, the word is stored in memory. Next time your child sees it, they read it at once, without sounding it out.

How does it work, step by step?

Take the word "ship". Your child already knows the spoken word. They know what a ship is. To map it, they need three things to happen.

1. They hear the three sounds in the spoken word: /sh/ /i/ /p/.
2. They know that sh spells /sh/, i spells /i/ and p spells /p/.
3. They look at the printed word and link each spelling to its sound, then blend them into "ship".

Do this correctly a few times and the word sticks. Some children need two or three tries. Others need ten or more. The number goes down as your child gets better at hearing sounds and knows more letter sounds.

Why can't my child just memorize words by shape?

Many of us were taught that way. Flash cards, word walls, "look at the shape of the word". It seems to work for a while. A child can learn 50 or 100 words by sight this way.

Then it falls apart. Words like "house", "horse" and "hose" look almost the same. Shape memory cannot keep thousands of words apart. Adults read about 30,000 to 70,000 words on sight. Nobody memorizes that many shapes. We read them because each one is linked to its sounds.

Why does guessing get in the way?

Because a guess skips the letters. If your child sees a picture of a boat and says "boat" for the word "ship", no link is made between s, h, i, p and the sounds. Even if the guess is right, the brain does not store the spelling.

That is why reading experts now advise against telling children to look at the picture or think of a word that makes sense. Those tips feel kind. But they teach your child to skip the very step that builds sight words.

What about tricky words like said?

Most tricky words are only tricky in one spot. In "said", the s and the d are normal. Only the ai is odd, because it says /e/ here. Your child can map the normal parts the usual way and just remember the odd part.

Some teachers draw a small heart over the odd letters. They call these heart words, because you have to learn that part by heart. This is much easier than memorizing the whole word, and it still uses mapping.

How can I help my child map words at home?

• Play sound games in the car: "What sounds are in dog?" Hearing sounds is the base for mapping.
• Teach letter sounds, not just letter names. The name of w is "double-u", but its sound is /w/.
• Give books your child can sound out, called decodable books, for practice reading.
• When your child is stuck, say "Look at the letters", not "Look at the picture".
• Have them spell words too. Spelling makes them pay attention to every letter.
• Reread the same short book two or three times over a few days. Each correct read helps the words stick.

Ten to fifteen minutes a day of this kind of practice adds up. You will notice words that used to take five seconds now come in one.

How do I know it is working?

Watch how your child reads words they have practiced. At first they say each sound out loud. Then they whisper the sounds. Then they look at the word for a second and say it. Then they just read it. That last step is mapping done.

Another sign: your child starts reading new words faster too, even ones they have never seen. That is because they know the patterns. Ehri calls this the consolidated phase, when children read chunks like -ing and -ight as one unit.

If your child still sounds out the same simple words after weeks of practice, talk to their teacher. Some children need more practice hearing sounds first. A few need a closer look from a reading specialist.