b and d confusion in kids: why it happens and how to fix it

Confusing the letters b and d while reading and writing is common in preschoolers and normal until about six and a half to seven years of age. It is often taken as a sign of dyslexia, but on its own it is not. Simple, consistent correction at home and school usually resolves it before it hinders learning.

Why do children mix up b and d?

The difficulty comes from how our brains interpret visual signals. A brain’s default assumption is that similar shapes represent the same underlying object, which is usually a helpful shortcut: a cup is a cup whichever way it faces. To a young child, b and d look like the same shape seen from different angles, and the idea that the viewing angle changes the identity of a letter takes real processing effort to accept.

Dyslexia can be one reason for persistent reversals, but it is not the only one. Around 8 out of 10 people with dyslexia have difficulty with directional knowledge, which produces the left-right and up-down flipping seen in b/d, p/q, and 6/9. When dyslexia is behind the reversals, the child usually struggles with other things too: letter and number sequencing, poor and inconsistent spelling, and simple maths. A child who only flips b and d, and does so before age seven, is most likely just being a normal young reader. If the reversals persist alongside those other signs, it is worth checking the broader early indicators of learning difficulty and the facts about dyslexia.

Reversals before age seven are development, not diagnosis.

Three ways to help at home

1. Give each letter a picture

The easiest explanation is a visual one: b has a belly, d has a diaper. Draw it, laugh about it, and repeat it every time you teach the letters or your child slips. Gradually the picture does the remembering for them, and the correct letter starts appearing in their spellings.

2. Teach the “b hand”

Try this simple elastic-band activity. Sit with your child and put a band on their left hand, without mentioning left or right. Ask them to make a b shape with the fingers of that hand. Now show flashcards or words starting with b. The child begins to visualise the b shape and recognises it wherever it appears. Repeat the band activity for two to three weeks; after that the hand knows its job without the band. It is simply their b hand.

3. Use one-letter-at-a-time worksheets

Print worksheets where your child circles only the letter b, or colours only the b shapes. The one rule that matters: work on a single letter at a time. Do not mix b and d in the same activity; the whole point is to let one letter become automatic before its mirror twin re-enters the room.

For a lovely demonstration of this kind of correction in practice, watch reading expert Linda Farrell working with Aiko, a second-grader, in this video.

Frequently asked questions

My 5-year-old writes b as d. Should I worry?

No. At five, reversals are developmentally normal. Use the tricks above, keep it playful, and expect the confusion to fade by around age seven.

When do reversals suggest something more?

When they persist past seven despite consistent correction, or come with trouble sequencing letters and numbers, inconsistent spelling, and difficulty with simple maths. That cluster deserves a proper assessment rather than more worksheets.

Dr. V.S. Gayathri is a Certified Dyslexia Therapist, an Orton-Gillingham trained literacy specialist, and the founder of Flourishing Kids. She has delivered over 4,000 hours of one-to-one reading and spelling intervention, helping children across multiple countries build stronger literacy skills. If your child’s letter reversals are persisting, get in touch for a free 15-minute conversation.