Measure It game (choose "Medium" level)
Strolling With My Gnomies (inches and centimeters)
Area Shapes game
Area Snatcher
Perimeter Shapes game
Perimeter Explorer
Perimeter Snatcher
Perimeter Video - Math Antics
Perimeter Video - Khan Academy
Perimeter Song
Perimeter Cat Song
Perimeter Song - "...the length around..."
Perimeter/Area NumberRock Song
Online Geoboard