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Pillar 01 · Understanding dyslexia

Signs and symptoms of dyslexia

What to look for before kindergarten, through elementary school, in the teenage years and in adults, plus the one sign most people watch for that turns out not to be reliable at all.

Written and reviewed by the Certified Academic Language Therapists of Key School and Training Center, Fort Worth Last reviewed August 2026

The pattern to look for

No single behavior identifies dyslexia. What identifies it is a gap: a child who reasons, talks and understands at or above age level, and who reads and spells well below it, even though the teaching has been good and the effort has been real.

That word “unexpected” does a lot of work. Plenty of children read slowly in first grade. What separates dyslexia from a slow start is that the difficulty stays put while everything else about the child moves forward, and it stays put through the kind of practice that resolves an ordinary lag.

The signs below are grouped by age. A child does not need all of them. A cluster of four or five in one age band, especially alongside a family history of reading or spelling difficulty, is worth acting on.

Texas families

Texas public schools are required to screen students for dyslexia in kindergarten and again in first grade. That screening is a useful net, but it is a net, not a diagnosis. If your child was screened and nothing came of it, and you are still seeing the pattern on this page, you are allowed to ask for a full evaluation.

Before kindergarten

At this age the signal is in spoken language and sound awareness, long before reading is expected. These are the earliest indicators available, and they are the ones most often waved off as normal variation.

Ages 3 to 5

What to watch for

  • Late talking, or speech that stayed hard to understand longer than a sibling
  • Trouble learning nursery rhymes, or not enjoying rhyming games
  • Cannot tell you which words rhyme, or make up a rhyme on request
  • Mixes up sounds in longer words, saying “aminal” or “pasghetti” past the age most children stop
  • Difficulty learning the names of letters, especially the letters in their own name
  • Trouble recalling the right word, substituting a vague word or “that thing”
  • A parent, aunt, uncle or grandparent who struggled with reading or spelling

Kindergarten through second grade

This is the window where intervention is fastest and cheapest, and it is also the window most often spent waiting. The signs here are specific enough to act on.

Ages 5 to 8

What to watch for

  • Struggles to connect letters to their sounds, and the connection does not stick from one day to the next
  • Cannot blend sounds into a word, or break a word into its sounds
  • Reads a word correctly on one line and misses it on the next
  • Guesses at words from the first letter or the picture instead of decoding them
  • Reading aloud is slow, choppy and visibly effortful
  • Spelling is wildly inconsistent, including for words practiced all week
  • Avoids reading, hides books, complains of headaches or stomach aches at reading time
  • Understands the story perfectly when an adult reads it aloud
The single strongest signal

A large gap between what a child understands when they listen and what they get from the same material when they read it is the most telling sign on this page. It points directly at decoding rather than at comprehension, attention or effort.

Third through fifth grade

Around third grade the demand shifts from learning to read to reading to learn. Students who have been compensating start to fall behind visibly, and the difficulty often shows up first as a change in behavior or in grades outside of reading class.

Ages 8 to 11

What to watch for

  • Reads accurately but so slowly that homework takes hours
  • Skips or misreads small words such as of, for, from and their
  • Struggles with multisyllable words and avoids attempting them
  • Spelling does not improve despite word lists and practice
  • Written work is far below what the same student can say out loud
  • Trouble in math word problems while calculation itself is fine
  • Reluctance to read aloud in class, often expressed as clowning or refusal
  • Fatigue, frustration or shutting down during reading and writing tasks

Middle and high school

Older students with dyslexia are usually skilled compensators. They have memorized enough words to get by, and the difficulty surfaces in speed, spelling and stamina rather than in obvious decoding errors.

Ages 11 to 18

What to watch for

  • Reading is accurate but far slower than peers, so assignments pile up
  • Persistent spelling errors in otherwise strong writing
  • Avoids reading for pleasure entirely
  • Trouble taking notes and listening at the same time
  • Difficulty learning a foreign language, often the first place it becomes undeniable
  • Runs out of time on tests while knowing the material
  • Strong in discussion, weak on the written product
  • Describes reading as exhausting rather than as difficult

Adults

Many adults reach middle age without ever being identified. They have built careers around the difficulty, chosen fields that ask less of reading, and assumed they were simply not academic. Identification still matters at this stage, both because instruction still works and because it changes how a person understands their own history.

Adulthood

What to watch for

  • Avoids reading aloud, including to your own children
  • Reads slowly and rereads paragraphs to hold on to the meaning
  • Relies heavily on spellcheck, and it still is not enough
  • Prefers audio, video or being told over reading a document
  • Trouble with forms, and a strong dislike of filling them in publicly
  • A childhood memory of being called lazy, careless or a slow starter
  • A child who has just been identified, which is how many adults find out

What is not a reliable sign

Some of the best known indicators are the weakest. Watching for these instead of the ones above is a common reason children are missed.

  • Reversing b and d, or p and q. Reversals are developmentally normal until roughly age seven and occur in strong readers too. On their own they identify nothing.
  • Letters appearing to move or jump on the page. Dyslexia is a language processing difference, not a vision difference. Reported visual symptoms are worth an eye exam, but they are not what dyslexia is.
  • Writing letters backward. Same point. Common in young children generally.
  • Low grades across every subject. Dyslexia is defined by an unexpected weakness. A student who is behind in everything needs an evaluation, but a different question is being asked.

What to do next

If several signs in your child’s age band describe them, the next step is not to buy a reading program. It is to find out what is actually going on, because the instruction that works for dyslexia is specific and the instruction that does not work is widely available.

  • Write down what you are seeing. Dates, specific examples, and how long homework takes. Schools respond to specifics far better than to worry.
  • Request an evaluation in writing. A written request to the school starts a timeline. A verbal one does not.
  • Ask about the reading instruction being used now. If the answer is more of the same, that is important information.
  • Do not wait for a grade level to pass. The gap widens with time. Students identified in kindergarten through second grade need less intervention than students identified in fourth grade or later.
Next step

Testing and diagnosis covers what an evaluation actually involves, how school based and private evaluations differ, and how to read the report you get back.

Sources

Where this information comes from

This page draws on the organizations below alongside the clinical experience of the therapists who teach at Key School. Where the sources disagree, or where a policy is still changing, we say so in the text instead of picking an answer for you.

  1. Dyslexia Basics fact sheet International Dyslexia Association
  2. The Dyslexia Handbook, on kindergarten and first grade screening requirements Texas Education Agency
  3. Signs of Dyslexia by age Yale Center for Dyslexia and Creativity
  4. Screening for reading difficulty National Center on Improving Literacy
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Behind this resource

A Fort Worth school that has done this 10,000 times

Key School and Training Center has served students with dyslexia and related learning differences since 1966. Our Key Dyslexia Therapy Training Program prepares Certified Academic Language Therapists across the region, which means the guidance on this site comes from people who teach these students every day, not from a content team.

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