Quick answer: Childhood apraxia of speech (CAS) is a motor speech disorder: the child knows what they want to say, but the brain has trouble planning and coordinating the movements of the lips, jaw and tongue. Core signs include inconsistent errors on sounds and vowels, choppy transitions between sounds and syllables, and unusual stress or rhythm. CAS is rare, about 1 in 1,000 children, and responds best to frequent, intensive speech therapy, with AAC used alongside speech when needed.
In this guide
Imagine knowing exactly what you want to say but having your mouth refuse to cooperate, saying a word right once and wrong the next time. That is daily life for children with childhood apraxia of speech. Understanding CAS helps families and teachers respond with patience instead of pressure.
The 3 Core Features of Childhood Apraxia of Speech
ASHA’s three consensus features
These features come from the American Speech-Language-Hearing Association, which estimates CAS affects about 1 in 1,000 children aged 4 to 8 (ASHA Practice Portal).
Key point: Childhood apraxia of speech is a planning problem, not a muscle weakness or a lack of understanding.
CAS vs Other Speech Disorders
| Childhood apraxia of speech | Articulation or phonological disorder | Dysarthria | |
|---|---|---|---|
| Main problem | Planning speech movements | Learning sound rules or producing specific sounds | Muscle weakness or poor control |
| Errors | Inconsistent | Consistent patterns | Consistent, slurred |
| Longer words | Much harder | Somewhat harder | Harder with fatigue |
| Therapy | Frequent motor practice | Sound or pattern teaching | Strength, breath, rate |
Signs of Childhood Apraxia of Speech by Age
| Age | Possible signs |
|---|---|
| Under 3 | Limited babbling, few words, groping mouth movements |
| 3 to 5 | Understands much more than they can say, inconsistent errors, frustration |
| 6 to 10 | Difficulty with long words, reading aloud and spelling; speech still hard to understand |
Therapy and AAC for Childhood Apraxia of Speech
- Frequent, intensive practice: ASHA notes that many short, focused practice trials lead to faster progress.
- Multisensory cues: touch, visual and verbal prompts for mouth movements.
- Practice real words the child needs every day.
- AAC (picture boards, speech-generating devices) supports communication now and does not stop speech from developing. See AAC in the classroom.
Classroom Support
Teacher script when speech is hard to understand
“I want to understand you. Can you show me, point, or tell me another way?” Then repeat back what you understood: “You want the blue marker. Got it.”
- Never force a child to repeat words in front of peers.
- Give extra time and accept other ways to answer.
- Offer alternatives to reading aloud.
- Keep the AAC device available all day, in every class.
- Coordinate with the speech-language pathologist on target words.
Real-Life Example
Case story
Ellie, 5, understood everything but was mostly silent at school. After a CAS diagnosis, she started therapy four times a week and used a tablet with a communication app in class. Her teacher set up a “talk or tap” rule for answers. Within a year, Ellie used two to three word phrases clearly, and still tapped her device for longer messages.
Parent tip: Short, fun practice every day beats one long session a week. Practice two or three words your child really wants to say.
Childhood Apraxia of Speech FAQ
What is childhood apraxia of speech?
A motor speech disorder in which the brain has trouble planning the movements for speech.
How common is CAS?
About 1 in 1,000 children, according to ASHA.
Will AAC stop my child from talking?
No. Research and clinical guidance support AAC alongside speech therapy.
Who diagnoses CAS?
A speech-language pathologist with experience in motor speech disorders.
Can CAS be outgrown?
CAS does not simply go away, but many children make major progress with intensive therapy.
In short: Childhood apraxia of speech needs frequent, focused therapy, communication options like AAC and a patient classroom. This article is part of our Disabilities Less Covered series.
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Related: Learn more about articulation disorders in children and speech milestones by age, part of our Speech Delay guide.
Sources
- ASHA Practice Portal. Childhood Apraxia of Speech
- ASHA. Childhood Apraxia of Speech (for families)
- Illinois Early Learning Project. 10 early signs of CAS
This article is educational and does not replace professional advice.
