My teacher discourages using online encyclopedias to answer our terms (because the textbook is the only thing approved by the College Board), but I have worksheets that ask about this and that and I was thinking it would probably be easier if I found it online and answered it... What's the harm if it's the same information? No harm at all... There's always alternative sources, always....

So can anyone fill me in? I only got to this website because one of my friends referred me to it, so I'm not really up on this stuff.