I took five years of French but can't speak more than two sentences because I haven't used it. It is the same for a child. Assessment is an on-going process. Assessment of skills should be occurring throughout a child's program. A skill is of no use if your child can only demonstrate it at a table in a quiet room with one person.
Reinforcement is the key to a successful program.
Without effective reinforcement, your child will not learn. Reinforcers must be evaluated and re-evaluated regularly for effectiveness. Parents, you didn't sign up for this class. I recognize the fact that you love your child more than anything and know your child better than anyone. You have the final say in everything pertaining to your child.