Don’t make any significant changes in the plan until your child has maintained improvements over one and preferably two marking terms (3 to 4 months). It’s not unusual for this plan to work initially, making parents and teachers overconfident that the problem has been solved permanently. But if you drop the plan altogether or become a lot less vigilant, your child’s performance is likely to return, even if only gradually, to preplan levels.
Peg Dawson and Richard Guare in Smart but Scattered