Ahhh....I see lots and lots of questions on here, and since there seems to be only one other student, I'll try to help as well
Keep in mind I went to VT last year, for EE, but transferred to UVA, so I can only really help with basic/freshman stuff
and YES, Chang is the best. I had Slawny and he was ridiculous. We were at chapter 10 when Change was at 4, the man couldn't teach, his accent was unbearable, and he would call you out and yell at you in class for stupid stuff. I don't know how I got a B in that class, I didn't learn anything.