For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
1st period- 7:53-8:50- Math
2nd period- 8:4-9:48- Math
3rd period- 9:52-10:46- Math
Lunch 10:50-11:15
4th period- 11:19-12:13- Math
5th period- 12:21- 1:11- Math
6th period- 1:15-2:08- Math
7th period- 2:12-3:10- Planning Period