One thing that hasn't been mentioned - sometimes it helps to have a second voice explaining things, if you didn't get it the first time. If there's something ab

One thing that hasn't been mentioned - sometimes it helps to have a second voice explaining things, if you didn't get it the first time. If there's something about the professors explanation that is the problem, even if they're accessible it may not help. A good TA can help approach things from a different direction.