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 – U.S. History
2nd Period – World History
3rd Period – World History
4th Period – U.S. History
5th Period – English/History EOC Prep
6th Period – Duty
7th Period – Honors World History
8th Period – Conference 2:45 - 3:05