Math Teachers

Algebra Rules for Arithmetic: The most useful rules of basic algebra - free, simple, & intuitively organized

GeoGebra: GeoGebra (www.geogebra.org) is free dynamic mathematics software for all levels of education that brings together geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package. Interactive learning, teaching and evaluation resources created with GeoGebra can be shared and used by everyone at tube.geogebra.org

Wolfram Alpha: Wolfram Alpha is one of the most sophisticated computable knowledge softwares out there. ‘Wolfram|Alpha introduces a fundamentally new way to get knowledge and answers - not by searching the web, but by doing dynamic computations based on a vast collection of built-in data, algorithms, and methods.

Desmos Graphing Calculator: Explore math with Desmos! Plot functions, create tables, add sliders, animate your graphs, and more -- all for free.

Graph.tk: Graph.tk is an easy to use, online, open-source graphing utility. Use the "+" button to create a new equation. Use "/" for fractions, "^" for exponentials, and "*" for multiplication. To type special characters use "\name". For example, "\sqrt" yields √, and \pi produces a π. Click the ">_" button in the app to get a calculator where you can calculate derivatives.