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:
First Period 7th Math 8:10-9:00
Second Period 7th Math 9:05-9:55
Third Period 6th Math 10:00-10:50
Fourth Period MS Computers 11:30-12:20
Fifth Period Plan 12:25-1:15
Sixth Period MS Athletics 1:20-2:10
Seventh Period HS Athletics 2:30-3:20