Letter reversals: b and d, and when to worry
In short
Reversing letters like b and d is normal for children up to about age 7 or 8, because these letters are mirror images and the brain treats mirror images as the same object. Teach b and d with different starting strokes. Lasting reversals with other reading problems deserve a closer look.
Why do children reverse b and d?
In everyday life, an object facing left is the same object facing right. A cup is a cup no matter which way the handle points. Children's brains are built to treat mirror images as the same thing. Letters are one of the few places where direction changes meaning, and young children have to learn that.
The letters b, d, p and q are especially tricky because they're mirror or flipped versions of each other. Other letters, like s, j and z, sometimes get reversed too. This is a normal part of learning to read and write, not a sign of seeing things backward.
When are letter reversals normal?
Reversals are common in kindergarten and first grade, and many children still make some in second grade. Most children stop reversing letters by about age 7 or 8, as they read and write more and the letters become familiar.
| Age | Reversals are... | What to do |
|---|---|---|
| 4 to 6 | Very common | Gentle correction and good teaching |
| 6 to 7 | Common, fading | Targeted practice on problem letters |
| 7 to 8 | Less common | Check reading skills if frequent |
| After 8 | Uncommon | Look at reading and writing more broadly |
Reversals on their own aren't a sign of dyslexia. Many children who reverse letters learn to read without trouble, and many children with dyslexia don't reverse letters much at all.
How do you teach b and d so they stay apart?
The most effective approach is to teach the two letters with different starting movements. Teach b with letters that start with a straight line down, and teach d with letters that start with a curve, like c and a. When the hand starts differently, the letters are harder to mix up.
- Teach b with the cue "down, back up, around": pull a line down, go back up partway, and make a bump.
- Teach d with the cue "start like c, then up and down": make a c, then a tall line.
- Teach them at least a week or two apart, so the first one is solid before the second arrives.
- Have students say the sound as they write the letter, every time.
- Give each letter its own picture word, such as bat for b and dog for d.
- Parent
- Is this a b or a d?
- Child
- Um, b?
- Parent
- Let's check. How do you start a d?
- Child
- Like a c. Oh, this one starts like a c. It's a d.
- Parent
- Yes. D starts like c, and b starts with a line.
Do tricks like the bed trick help?
Some simple tricks help. In the "bed" trick, the word bed looks like a bed when written in lowercase, with b as the headboard and d as the footboard. Children can picture it when they're unsure. Another trick uses the hands: make two thumbs-up fists facing each other, and the left looks like b, the right like d.
These tricks are helpful supports, but they're not the main fix. The strongest help comes from teaching the letters with different starting strokes and lots of reading and writing practice.
What about reversals in reading?
Children also reverse letters when reading, reading "dig" as "big" or "was" as "saw". In reading, the fix is to focus on the sounds. Prompt the child to look at the first letter and say its sound before reading the word.
Daily practice blending sounds from left to right helps a lot. Children who sound out words in order get used to looking at letters carefully and in sequence, which reduces both letter and word reversals.
When should you worry about reversals?
Reversals deserve a closer look when they continue frequently past about age 8, especially along with other signs: trouble learning letter sounds, difficulty sounding out words, slow progress in reading despite good teaching, or a family history of reading difficulties.
In that case, talk with your child's teacher or school about a reading evaluation. The concern isn't the reversals themselves, but whether they're part of a broader pattern. A qualified evaluator can look at the whole picture.
How long does it take to fix reversals?
With targeted practice, most children improve within a few weeks to a couple of months. Short daily practice of a few minutes, focused on the letters the child confuses, works better than long sessions.
Keep reading and writing practice going throughout. The more children read and write, the more familiar the letters become, and reversals fade naturally for most of them.
Can parents help with reversals at home?
Yes, with short and relaxed practice. Write b and d on two cards, each with a small picture of its keyword, like a bat and a dog. When your child writes or reads one of the letters, have them check the card if they're unsure, and say the sound out loud.
Avoid long drills or worksheets full of b's and d's mixed together. Mixing the two letters too early, before each one is solid, can make the confusion worse rather than better.