What is a speech sound disorder?

Any persistent difficulty with the perception of production of speech sounds.  Including...

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Articulation

How we make speech sounds using our mouth, lips, and tongue.  For example we need to be able to say the "r" sound to say "rabbit" instead of "wabbit."

Phonology

How children simplify sounds in the context of language.  Children with phonological delays/disorders exhibit consistent patterns of sound substitutions or omissions.

Childhood Apraxia of Speech (CAS)

Is an uncommon motor speech disorder where children have difficulty producing sounds due to problem planning the motor movements of speech.