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When your child first began speech therapy, you should have received a comprehensive treatment plan from the speech-language pathologist (SLP). You should also periodically receive progress reports, either written or verbal. If the SLP has so far provided you with neither of these, ask for them as soon as possible. The point of speech therapy is to help your child improve his communication skills. The best way to ensure that he is improving is to evaluate whether he has met measurable goals.