WHO KNEW? This is a cool way of showing students how to order fractions. Many students look at fractions and automatically shut down. This takes the fraction aspect out of the problem and gives students whole numbers to work with.

An online scientific calculator for when you need one, but you don't have one. Also compatible with iPod touches, iPads, and other mobile Apple products.

Hilarious Pi T-Shirts by SnorgTees. We're math nerds too, and we love pi jokes. Check out our great selection of funny pi tee designs printed on our super soft and comfy shirts.

What are the odds of getting "tails" when you flip a coin? What is the chance that it will rain tomorrow? If you guess on a multiple choice test, how often will you probably guess correctly? All these questions involve calculating probability,

Speed Crunch performs all of the functions necessary for high school Algebra and Geometry courses except graphing. In addition to performing all of these functions, Speed Crunch has a "math book" containing commonly used equations and formulas.

The McGraw Hill Mathematics eGlossary provides written and verbal definitions and explanations of mathematics terms. The glossary is divided by grade level. Select your grade level then the first letter of the term for which you need an explanation. The explanation is offered in text form as well as verbal (click the speaker icon to listen).

Microsoft offers scientific calculator that you can download for free (Windows only). Microsoft Mathematics 4.0 is a graphing calculator that plots in 2D and 3D. Of course, the calculator does many other functions such as solving inequalities, converting units of measure, and performing matrix and vector operations.

Calculator Soup -- Online algebra calculators for cube roots, square roots, exponents, any radicals or roots, simplifying radical expressions, fractional exponents and the quadratic equation.

This site is an amazing resource for math equations. Find equations for calculus, geometry, algebra, and trigonometry.

Encalc is a free online scientific calculator. Encalc describes itself on its homepage as follows, "Encalc is an online scientific calculator. Its strength lies in its ability handle units and dimensional analysis, to define variables and its large database of constants. Parenthesis and scientific formulas are also supported."