I just have to add, regarding the whole parent grounding their teenage sims, it is REALLY stupid that while they are grounded and the kid tries to go to school, the parent forbids it and says, "I don't think so lady/lad, you're grounded." Then they won't go to school and you can't make them. Then, when the parents realizes the child misses school, they scold the kid and say, "You're in big trouble! You better not do that again! Go do some chores to get on my good side."
What the heck? You stop them from going to school because they're grounded, then because they stayed home and obeyed you you get ticked at them for skipping school??
That is one of the many things that is annoying and does not make sense to me in the Sims 3...