I don't have it yet, but my theoretical plan will be to have my sims spend four terms at university with three classes each. I currently play a rotation with one week with each household, but I'll play two weeks each rotation with the university households. I plan to leave aging on for the first two weeks and turn it off for the second two weeks, so they age the same as everyone else even though they get played twice as long (aging on for active household only). Or I might just give them a potion of youth when they graduate so I don't have to remember to change the aging thing between households...