Isn't the whole point of the IOWA scale to prevent accelerating kids who aren't good candidates and might have a bad outcome. Of course it can go wrong. Either where the child was not a good candidate OR where the child is not supported or is even actively sabotaged. Doesn't mean it's not absolutely the best choice for the right child...

I'm so relieved we skipped my DD... And worried that we should have held back another DD who is extremely young for grade due to birthdate.... Cuts both ways with outliers...