What I have seen is a lot of kids really take off because they do have the one-on-one attention and they are up to grade level, if not beyond,as a result of having been in the program.(original)
Question:
How to understand such as "if not beyond,as a result of having been in the program"?
↣I guess its meaning is:
even if the kids don't arrive at the eligible for taking off, this is the their good result of their having been training to .
Is my guess correct?