http://www.bbc.co.uk/skillswise/numbers/wholenumbers/: Excellent site for brushing up the basics

http://www.coolmath.com/home.htm : good section on fractions

http://www.netrover.com/~kingskid/MulTab/Applet.html: Don't waste valuable time in your exam wondering what 6 x 7 is. You know you should have learnt it years ago. This site will help you mug up your times tables. When you've done, you can practice at: http://www.mathsisfun.com/timestable.html

http://library.thinkquest.org/16661/index.html?tqskip1=1 : Totally Tessellated: fun things to do with tessellations (tilings).

http://www.mathcats.com/contents.html: Plenty of fun things, and some useful ones as well, including interactive multiplication tables for those who need to learn them, a good Metric / Imperial converter, and an interesting section on how the ancient Egptians wrote fractions.

http://www.uyseg.org/risked/pages/prob/prob_liklihood_scale.htm: The basics of probability

http://www.mathsonline.co.uk/nonmembers/resource/prob/index.html: Probability simulations of dice, spinners, and Santa's sack.

Run out of graph paper? Need some isometric, squared or dotty? Print some off for free at: http://www.mathsphere.co.uk/Resources/MathSphereFreeGraphPaper.shtml