20% They Write Off

We were at our wit's end and couldn't figure out why my son was having problems with seemingly everything. Was it environmental, hereditary, induced by something else or all of these factors combined? He was falling through the cracks at school, the 20% they write off. The answer came to us when he was 14, at the end of 8th grade, in a documentary on TV. The problem was finally solved, BUT was it too late to help him?