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:
Hours of Operation – Administration:
Monday - Thursday: 8 a.m. - 4:30 p.m.
Friday - 8 a.m. - 4 p.m.
Hours of Operation – Elementary & Secondary Offices:
Monday - Friday: 7:30 a.m. - 4:00 p.m.