Math

Excellent online graphing calculator that is also available as an app from both Apple and Android . Can save graphs, use pre-made graphs, and include sliders and tables in your graphs.

Interactive, free online graphing calculator from GeoGebra: graph functions, plot data, drag sliders, and much more!

A free graphing calculator - graph function, examine intersection points, find maximum and minimum and much more.

Free TI calculator emulator for Android phones and tablets.

Available as an app from both Apple and Android . Can save graphs, use pre-made graphs, and include sliders and tables in your graphs.

Notes and examples on how to use TI-83 + / TI-84 + graphing calculators. Organized by level and topic.

Online copies of the guidebooks that come with each of the Texas calculators.