My biggest challenge was that large public high schools would teach too hands on; I think more of the classes should've worked like college lecture halls. The kids at my public high school were noisy, distracting, and frankly idiotic in more than half of my classes, so the fact that there wasn't really any classes with structured syllabi made the classes unbearable. Now I am in a much smaller private school and find that hands on learning is much more effective; the teacher can work really closely with you.
Did you have any routines as a child that you grew out of? Things like only eating particular foods, or perhaps at a particular time?
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If all mankind were to disappear, the world would regenerate back to the rich state of equilibrium that existed ten thousand years ago. If insects were to vanish, the environment would collapse into chaos.
-E.O. Wilson