Your school or district administrator chooses which class rosters to provide to XtraMath. XtraMath syncs with the school or district's ClassLink Rostering Server every night, so any changes or additions to rosters will appear in XtraMath by the next day. If you run into issues where you are missing a class or an individual student, talk to your administrator and make sure the roster looks correct within ClassLink.
Instructions for ClassLink administrators can be found here.
