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:
7th Grade: 8:30-9:15 - A-D 9:15-10:00 - E-J 10:00-10:45 - K-R 10:45-11:30 - S-Z 11:30-1:00 - Lunch 8th Grade: 1:00 - 1:45 - A-E 1:45-2:30 - F-L 2:30 - 3:15 - M-R 3:15-4:00 - S-Z