As a child, I had a learning disability, my school's principal told my parents that I'd never do anything with my life. My parents disagree and so did I, they found a private school that specialized in teaching students like me. The school did some intellectual tests to make sure I could learn, and learn I did.
They spent tens of thousands of dollars so that I could be taught, in that environment I excelled.
I don't trust the government to be a good judge of students abilities, because someone like me would be labelled dumb and be left behind forever.