1. Watch this study jams on Perimeter and take the test http://studyjams.scholastic.com/studyjams/jams/math/measurement/perimeter.htm
2. Play this perimeter game on ixl...sign in http://www.ixl.com/math/grade-3/perimeter
3. Find the perimeter of the missing side on ixl..sign in http://www.ixl.com/math/grade-3/perimeter-find-the-missing-side-length
4. Pick 3 perimeter games from this site. http://www.dovewhisper.com/4th_C_C_files/page0015.htm