Choose your classes with the easy-to-use setup screens, and use the intuitive tab interface to navigate between days.
Timetable has built-in support for multiple weeks, and automatically opens to the right day. It's also optimised for Android 4.2!
Timetable 1, with all sorts of new features, is coming soon - check out the alpha build at http://forum.xda-developers.com/showthread.php?t=1480086 !
The notification uses the new-to-Jelly-Bean priorities system - most of the time, it's an opportunistic notification (that is, there's no icon in the status bar, and it appears at the bottom of the list), but it gets increasingly prioritised as the battery level decreases, starting at 30%. It's among the first apps to harness the new priorities capability, and the low priority makes it among the least annoying notifications.