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:
7:25 a.m. – Building opens
7:45 a.m. – School Starts
7:55 a.m. – Tardy Bell Rings
All students tardy after 7:55 a.m.
3:15 p.m. – Dismissal