Why Back In School?

Bruce Robison posted the question a couple of posts back asking why I am back in school. Simply, I have always had the desire to teach, and in order to be able to do it in the field where I feel I can have the greatest impact, I need to get more credits in math and science. I am finding myself struggling, but for very different reasons than the first time around. Now, it's lack of practice, back then it was laziness.