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: 7:45 – 8:35
Breakfast: 8:35 – 8:55
2nd Period: 8:58 – 9:48
3rd Period: 9:51 – 10:41
4th Period: 10:44 – 11:34
Tutorials: 11:37 – 12:22
Lunch: 12:22 – 12:52
5th Period: 12:55 – 1:45
6th Period: 1:48 – 2:38
7th Period: 2:41 – 3:31