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:
Monday-Thursday Schedule:
Advisory: 8:05 – 8:40
1st (Honors) & 5th Period (Honors): 8:45 – 10:15
2nd (Honors) & 6th Period (Conference T & TR): 10:20 – 11:50
3rd & 7th Period (Honors T & TR): 11:55 – 2:00
4th & 8th Period: 2:05 – 3:35