[ZenGum]

My job involves providing academic support to people like this.

Quite a few are recent migrants or refugees. One chap from Sudan needed to learn statistics. Trying to teach him that, I discovered he had never seen algebra before. I skipped that and then realised he could not even add up single digit numbers. Then I watched him mess it up by misusing a calculator (pressing + and = too many times). This guy is supposed to understand statistics! We did him no favours letting him into university when what he needs is high school. I'm willing to bet he knows how long he can sustain suppressing fire with an AK-47 and three clips of ammo, though!

I could throw out a dozen more examples like this. I believe in accessible education, but it has to be at the right level for the student.