"Tre, who was in a math support class of mine last year, had phenomenal retention of any concrete fact he learned. Total inability to grasp abstract concepts. Couldn’t estimate. Couldn’t isolate x. Couldn’t figure out what the slope of a line was. I’d ask him things like “if you rolled a ball down this line, which one would go faster?” and he’d struggle for minutes just to figure out what I meant. If it wasn’t real, it didn’t exist. He got pretty good at percentages without actually understanding them—but 20% was divide by 5, 25% was divide by 4, 10% was divide by 10. He was motivated. Great kid, fantastic athlete, failing algebra for the fourth time kept him off the his strongest sports team his senior year and broke his heart. But he took up a second sport and made the state finals. He seemed a bit slow in conversation, but nothing that would mark him as really low intellect. He held a job, worked hard, was a popular kid. There was no way he would be passing the test, and when I communicated this to the AVP, she said, “He was not classified correctly, for various reasons”—one of the reasons probably being that Tre is black. She mentioned his tested IQ that his parents included in his file, and it was well south of 90, but still much higher than 70.

Mohammed was in another of my math classes last year. Unlike Tre, does not communicate his mental disability immediately. He talks quickly, cracks decent jokes, likes people around, while Tre was happier off in a corner listening to music. It took me a while to realize that Mohammed, who is neither black nor Hispanic, wasn’t retaining any information at all. Once I did realize this, I looked more closely at his IEP and saw he was a special day students with an IQ in the mid-80s. Also an excellent athlete, but very different from Tre. No fact grasp at all. He couldn’t remember what you told him five minutes ago, much less yesterday. But he could solve a simple algebraic equation with a calculator. He’d have to relearn it almost every day, but he had the ability to abstract that Tre lacks. He very badly wanted to move on to the next math class in the sequence, against the recommendation of his special ed adviser, and nagged me constantly to support him in this quest. I was willing to help him try, but his sport kept him out of the classroom a couple days a week for nearly a month, and everything I’d managed to do to keep him not rolling backwards was undone. So I passed him and talked him into an easier course."

https://educationrealist.wordpress.com/2013/10/31/noahpinion...