Something I've been noticing a lot is that there are a LOT of students who have somehow slipped through a ton of cracks in the "system" of education. Today I heard something from a grad student that absolutely took the cake. He does tutoring and one day he is helping someone with their intro to mechanics work and he finds out something absolutely insane. The person had no concept of what volume was... he didn't know what it was! And there was nothing special about this person either... not foreign or "special" or anything that could remotely explain what was going on. Another time he had someone who (this is less spectacular) who did not know an ellipse was a shape! Now this stuff is 2nd grade information... and theres plenty of barriers meant to stop these people from advancing until they know the material... so what exactly is going on here? I mean you have to pass classes in every grade... you many times have to pass exit exams in high school.... theres math requirements in high school... theres math requirements to enter the university... theres even math requirements to get into that class. How are people doing this??? Does the educational system in the US need re-evaluating?