www.learningplanet.com/kids2.htm

http://teacher.scholastic.com/clifford1

http://pbskids.org/arthur/games/index.html

http://www.hbschool.com/activity/counting_money/

http://www.bbc.co.uk/schools/laac/numbers/chi.shtml

http://nlvm.usu.edu/en/nav/frames_asid_184_g_1_t_1.html