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:
8:00am – 10:00am Technology Admin
10:05am – 10:50am Physics
11:00am – Lunch
11:45am – 2:00pm Tech Admin
2:00pm- 2:45pm Planning Period
2:45pm – 3:30pm Tech Admin
Many days I am here before 8:00am and stay later than 3:30pm.