Guessing isn't laziness — it's a strategy that's worked before, and kids are efficient: if guessing from the picture gets the same praise as sounding out, why do the harder thing? Here's why it happens and how to rebuild the sounding-out habit.
The 4 most common causes
| Cause | How to spot it | The fix |
|---|---|---|
| Picture-guessing | Accuracy drops sharply when the picture is covered | Cover every picture before reading the word |
| First-letter guessing | Substitutes a different word with the same first letter ("horse" → "house") | Insist on reading every sound, not just the first one |
| Text is too hard | Guessing happens on most words, not just occasional ones | Drop to an easier decodable book temporarily |
| Praised for speed over accuracy | Rushes through without self-correcting obvious errors | Praise the sounding-out process, not just being fast |
The picture test
Cover the illustration on a page your child hasn't read yet and see what happens to accuracy. A big drop is a clear sign that pictures — not the letters — have been doing most of the reading work.
Praise the process, not just the answer
"I love how you sounded that whole word out" teaches something different than "good job" after a correct guess. Kids optimise for what gets praised — make sure it's the sounding-out, not just landing on the right word.
If guessing persists even with an appropriately levelled book and consistent practice, it may be worth a closer look — see our guide for struggling readers.
Guessing shows up alongside other patterns worth knowing — skipping words entirely is a close cousin, and if the habit persists despite practice, when to get a reading difficulty checked covers what's normal versus what's worth asking about.