Why Does My Child Know a Word One Day and Forget It the Next?
One of the most frustrating things for parents of struggling readers is watching their child successfully read or spell a word one day—and then seem to completely forget it the next.
You might find yourself thinking:
We just practiced this.
You knew this yesterday.
How can you read this word on one page and not recognize it on the next?
It can look like a child isn't paying attention, isn't trying, or simply needs to practice more. But for many struggling readers, especially children with dyslexia, there's more going on.
The problem may not be that your child didn't learn the skill at all. It may be that the skill hasn't become automatic yet.
Learning Something and Knowing It Automatically Are Different
Think about something you've learned to do automatically, like driving.
When you first learned, you had to consciously think about nearly everything. Check the mirror. Signal. Look over your shoulder. Turn the wheel. Watch your speed.
Eventually, those individual steps became automatic.
Reading develops in a similar way.
A beginning reader may need to consciously think about the sound each letter represents, hold those sounds in mind, blend them together, and then figure out what word they just read.
With practice and effective instruction, many of these processes become increasingly automatic.
But when they don't, reading continues to require a tremendous amount of mental effort.
That's why a child might successfully read a word during Tuesday's lesson but struggle with that same word on Wednesday.
Working Memory May Be Part of the Puzzle
Working memory is our ability to temporarily hold information in mind while we're doing something with it.
Reading and spelling ask a lot of working memory.
Imagine a child trying to sound out an unfamiliar word. They need to recognize the letters, retrieve the sounds associated with them, hold those sounds in mind, and blend them together—all while remembering where they are in the word.
Spelling requires a similar juggling act.
The child needs to hold the word in mind, identify its sounds, connect those sounds to letters or spelling patterns, remember the sequence, and write it down.
When decoding and spelling aren't automatic yet, these tasks can take up a lot of a child's available mental resources.
Sometimes what looks like forgetting is actually a child struggling to efficiently retrieve and use information while managing everything else the task requires.
What Might Parents Notice?
A child who hasn't developed automaticity with foundational reading skills might:
Read a word correctly and then struggle with the same word a few minutes later
Forget letter sounds or phonics patterns they've already practiced
Learn spelling words for a test and quickly forget them afterward
Need frequent reminders about previously taught reading rules
Lose track of sounds while trying to decode longer words
Guess at words rather than working through them
Spell the same word several different ways on the same page
Become tired or frustrated quickly during reading
Every child forgets things sometimes.
What we're looking for is a persistent pattern, especially when the child has received instruction and plenty of opportunities to practice.
Why Memorizing More Words Isn't Always the Answer
When children repeatedly forget words, it's tempting to respond with more flashcards and more memorization.
But imagine having to memorize every word you'll ever read.
That's an enormous task.
Instead, we want children to understand how words work.
Consider the word map.
A child doesn't need to memorize map as a picture. They can learn to identify the three sounds—/m/ /ă/ /p/—and connect those sounds with the letters m-a-p.
As their reading skills grow, children learn increasingly complex phonics patterns, syllable types, spelling rules, and meaningful word parts.
That knowledge gives them tools for approaching unfamiliar words rather than relying entirely on memory.
Structured Literacy Helps Build Automaticity
This is one reason I use a Structured Literacy approach with struggling readers.
Structured Literacy instruction is explicit, systematic, and cumulative.
Skills aren't introduced once and then forgotten as the class moves on to something new. Students learn concepts in a logical sequence, and previously taught skills continue to be reviewed and practiced as new skills are introduced.
For a struggling reader, that repeated practice matters.
A child may understand a concept before they can use it automatically. They need enough successful practice for the skill to become increasingly efficient.
As decoding becomes more automatic, it also frees up mental energy for something incredibly important:
understanding what they're reading.
What About Sight Words?
Parents often notice this problem most with sight words.
A child may recognize a word instantly one day and struggle with it the next.
It can be tempting to treat sight words as pictures children simply need to memorize. But written words are not stored in our brains in the same way we memorize a picture.
As children become skilled readers, they develop strong connections between the sounds in spoken words and the letters that represent those sounds.
Even when a word contains an unexpected spelling, much of the word may still follow patterns the child already knows.
Instead of asking a struggling reader to memorize the entire word visually, we can help them identify the parts they can decode and explicitly teach the part that is unexpected.
That gives the child something meaningful to connect to rather than relying entirely on visual memory.
Is Forgetting Words a Sign of Dyslexia?
Difficulty remembering words or spelling patterns by itself doesn't mean a child has dyslexia.
But when it occurs alongside other persistent reading difficulties, it may be part of a larger pattern.
For example, you might also notice that your child:
Has difficulty sounding out unfamiliar words
Reads slowly or with significant effort
Guesses at words
Has persistent difficulty with spelling
Struggles to remember previously taught phonics patterns
Understands much more when listening than when reading independently
If several of these sound familiar, you may want to learn more about the signs of dyslexia in children or talk with your child's teacher or a reading specialist about what you're noticing.
What Can I Do When My Child Forgets?
One small change can make a big difference:
Try to avoid saying, "You know this."
Your child probably does recognize that they've seen it before. Being reminded that they should know it doesn't give them a strategy for figuring it out.
Instead, help them use what they know.
You might say:
"Let's look at the sounds."
"What part of the word do you recognize?"
"Can you break it into smaller parts?"
"What rule or pattern have you learned that could help?"
The goal is not simply to get the correct answer.
The goal is to help your child develop a process they can use the next time they get stuck.
More Practice Isn't Always Better Practice
Struggling readers certainly need practice, but that doesn't mean an hour of flashcards every night.
In fact, long and frustrating practice sessions can quickly make a child dread reading.
Shorter periods of successful, targeted practice are often much more useful.
If a child repeatedly struggles with the same concept, it may also be a sign that they need the skill taught differently or broken into smaller steps—not simply practiced for a longer period of time.
When Might Reading Tutoring Help?
If you're constantly reteaching the same reading or spelling skills, your child isn't making expected progress, or reading continues to require an unusual amount of effort, individualized reading support may help.
Effective reading tutoring should go beyond helping a child get through tonight's homework.
It should identify which foundational skills are causing difficulty and provide explicit instruction and practice in those areas.
For students with dyslexia or significant decoding and spelling difficulties, I use the Barton Reading & Spelling System, an Orton-Gillingham influenced Structured Literacy program.
The goal isn't to help a child memorize enough words to get through today's reading assignment.
It's to give them skills they can use when they encounter tomorrow's words, too.
Looking for Reading or Dyslexia Tutoring?
If your child seems to learn reading or spelling skills only to forget them again, you're not alone in wondering why.
Understanding where reading is breaking down can help determine what kind of instruction your child needs.
Tutoring with Cassi Riggs provides individualized online reading intervention, dyslexia tutoring, Structured Literacy instruction, and Barton Reading & Spelling tutoring for struggling readers.
If you're wondering whether individualized reading support might be a good fit for your child, I'd be happy to talk with you about what you're noticing.
