maths
math stories - covers grades 1-5
math worksheets of all kinds
math worksheet creator - covers: addition, subtraction, multiplication, division, fractions, greater than/lesser than, rounding.
maths, grades K-6 need to register, but it is free
math manipulatives
change maker game - practice making change!
article on 'unschooling' math
another article on 'unschooling' math
simple math games you can make yourself