Windows: Firefox 3.0+ or Internet Explorer
Mac: Safari 2.0+ or Firefox 3.0+
PDF Viewer (Acrobat Reader)
Flash (used in training section, and K/1 online math tests for read aloud)
Spreadsheet program (only for viewing CSV exports of student scores)
Note: Some districts have network filters or firewall settings that block certain file types. You'll want to make sure that .flv files (for the training section) and .mp3 files (for the read-aloud option on K and 1 math tests) coming from easycbm.com do not get blocked.