Top of the Class - This one requires you to win the NCAA championship in an online season. In order to do this you will need to win at least 5 games in Head to Head mode, and win 3-4 games straight at the end of the "season". In order to avoid a bad game, tough opponent or any other major problem it is best to boost this trophy, at least the "playoff" games. It is best to have a vita or a PS4 for this trophy as you can use voice chat. Otherwise skype, teamspeak, or ventrillo could also work given the comfort level/equipment/setting. Count down from 3-2-1 and go at the same point. Make sure you know what team your partner is and wait until you see that team. If you don't, back out of restart the countdown. If you keep getting the same person (and it is not your partner) take a minute or two break and try again (this allows for that person to get into a game)
It is best to make a secondary profile for at least one side of the boosting. Basically if you got your wins first you create the second account (or use a second profile already created). This is because after winning the championship you will move up to level 2 making it harder for the game to pair you and your partner up.
After you win the championship, go into "play game", "head to head" and finally "view season record" (its the right option). The trophy should pop within a few seconds of viewing this screen.