Yes, it is amazing! Isn't it? An 18 year old in government high school can't possibly learn in a class with more than 20 students, but then graduates and a mere 12 weeks later is able to learn in lecture hall hall with 100 or more students. Wow! What an amazing quantum leap in maturity during those 12 week between high school and college! It must be a hormonal growth spurt. ( Heavy sarcasm!)
Also....When my homeschooled kids were in community college ( beginning at ages 13, 12, and 13) I noticed that the community college was amazingly effective at teaching remedial courses to high school illiterates and innumerates. Hm?....
The college could teach reading and arithmetic and bring these kids up to college level in about 2 years,...but...just 12 weeks earlier the government high school couldn't. Why is that? A mere 12 weeks between high school and college can make that much of a difference? Please remember these kids still lived in the same crummy dysfunctional families, still worked part-time jobs, still had the same friends...BUT...the community college could teach them to read and do math but the high school couldn't.
Probably because everyone there wanted to be there and wanted to learn, rather than seeing school as a socialization period with someone in the front just yammering away, or even worse, seeing school as a twelve year prison. Separate those kids out and suddenly education becomes much better for the rest and not much worse for the troublemakers.
You miss the obvious. Those even in community college want to be there.