Our Geometry Dictionary
http://www.math.okstate.edu/~rpsc/dict/Dictionary.html

Fun Mathematics Lessons by Cynthia Lanius
http://math.rice.edu/~lanius/Lessons/index.html

What's My Angle?
http://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.html

Estimating Angles-Banana Hunt
http://www.oswego.org/ocsd-web/games/bananahunt/bhunt.html

Guess the Random Angle (and other math games)
http://www.crick.northants.sch.uk/pagenumeracy.html

Angles Game
http://www.innovationslearning.co.uk/subjects/maths/activities/year6/angles/home.asp

Geometry Flash Card
http://www.aplusmath.com/cgi-bin/flashcards/geoflash

George the Geometric Giant
http://www.qesnrecit.qc.ca/cc/projects/05-06/geometry.htm

Cyberchase Star Gazing
http://pbskids.org/cyberchase/games/anglemeasurement/anglemeasurement.html

Illuminations: Geometric Solids
http://illuminations.nctm.org/ActivityDetail.aspx?ID=70

National Council of Teachers of Mathematics-Illuminations
http://illuminations.nctm.org/