Why help others? Ever thought of how well a professor knows the information; think he or she knew it that well the first time they taught it? I'll bet they didn't. When you take the time to help or teach someone else you're repeating the concept or facts in your own mind, verbalizing it, and thinking through it critically. The only caution I would give on helping others is if your professor grades on curve. You may help out the other too much and cut yourself out of the grade you deserve. - jf (a solid C student)