Quick Maths

http://www.mathplayground.com/quick_math.html

Doubles and Near Doubles

http://www.ictgames.com/doubles.htm

Dinosaur Dentist http://www.ictgames.com/dinosaurDentist/index.html

Robin Doubles http://www.ictgames.com/robindoubles.html

Robin Doubles beyond 10 http://www.ictgames.com/rhoodbeyond10.html

Bridge Doubles http://www.ictgames.com/bridgedoubles.html