Hi, I had the same problem, 7 of my sims stop goin to work and the pre teens stopped goin t school. I have used the time cheat and that when it started for me. I tried what one person suggested, that was setting time time back to the future, it's not January and I set it to December 2013 and when I started the game their brief cases flash, I don't kno what will happen when I set the time back to the present but hopefully that fixed it o.o. If you didn't use the money cheat still try that way of changing the date on the iPad, and restarting the game. Then change it back and restart the game again. Remember to sign back into FaceTime and messages, tampering with the date signs me out.
Tina...