math

Brain Teaser Contest - check back for weekly changes
Allmath.com flash cards and biographies of mathematicians
A+ Math  flash cards, problems, and help
Math Test  This is very basic
Math Archives - lots of math sites; almost all types of problems have drills at this site
Mad Math Minute  How many can you get right?
Math Problem Solving  lots of free worksheets for practice
How to Use Venn Diagrams to Solve Problems  this makes a hard problem easy
Arithm  100 problem challenge (use the enter key)
Multiplication  java applet to help you understand
Multiplication  a concentration matching game
Multiplication Tips  Knowing these makes it easy to do problems.
Fresh Baked Fractions  Choose from four levels
Shape Surveyor  calculate area and perimeter
Quia math Activities  more than twenty great ones
Math Goodies  good explanations with visuals that really help
Math in Daily Life  There are so many examples!
Webmath - you can check your math or learn how to do all kinds of problems

Fun Stuff

Logic Patterns  Which one completes it?
Magic Squares   - Learn how they work, then try a few problems.
Math League Help Topics   - Subdivided carefully
Brain Teasers   - Keep the gray matter in shape.
Online Math - real world problems
Puzzler   - These problems can be deceptive.
Math Magic   - Check out the grade level challenges.
No Matter What Shape Your Fractions are In   - Great learning on all the attached pages too.
Polyominos   - Great for Dominos and Tetris fans.
Tangrams   - Check you spatial skills and learn geometry too.
Tessellations: Step by Step - just the basics
Tessellation Tutorials   - This site makes it easy.
Totally Tessellated  great Thinkquest entry
Tessellations Explained - just the very basics
Rough Diamonds - tessellation examples drawn with Java applets
Power Cards  Can you figure it out?

Reference

Roman Numerals   - These can be tricky because there is no place value.
The Abacus - learn how to use this great device
Ask Dr. Math  Answers to many questions are here.
The Math Forum - Ask Dr. Math   - Think first. Then ask.