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:
1st period – 8th Grade Percussion
2nd period – 7th Grade Percussion
3rd period – 6th Grade Percussion
4th period – 6th Grade Woodwinds
6th period – High School Percussion
7th Period – 6th Grade Low Brass
8th period – Conference/ Lunch