Make your own maths worksheets with number ranges and operations you define (including decimals). Presented in column format.
This is a series of flash based whiteboard helps for class mathematics - useful for fractions, counting,etc
The Rudiments Of Wisdom encyclopaedia by Tim Hunkin. Thousands of cartoons covering almost everything there is to know!
A selection of maths booster topics with a 'game' front end
The home page of Count on maths year web site (UK)
Woodland's school revision zone for literacy,numeracy and science
This site aims to bring collect together and order a range of free resources for UK schools
Free numeracy software to support mathematics teaching in schools
Excellent series of games to practice maths - well worth buying although these run with a "sample" watermark.