Square Grid in Geogebra

This is a square grid designed to make it easy to create square graphs for insertion into word processing documents. The full power of Geogebra is behind it. To copy the graph you've made, choose "Graphics View to Clipboard" from the Edit menu.

Practice writing linear equations

This applet that I developed using Geogebra generates a line, asks the user to provide an equation and then indicates whether the submitted equation is correct.

Connecting exponential equations and their graphs

This is a Geogebra applet created by Steve Phelps in which you construct the graph of an exponential function by placing the asymptote, the y-intercept and one other point. You then type in what you think the graph of your equation ought to be. The equation you type in is graphed so you can see if you're right.

Introduction to the Unit Circle

These are three versions of an applet that I created using GeoGebra to introduce students to the unit circle. One version presents the idea in terms of distance traveled around the circle. The other two present the idea in terms of the measure of the central angle. There is a radian version and a degree version.

Finding Equations of Lines in Photos

This is a set of applets I made using Geogebra. In each applet you fit linear equations, in slope-intercept form and point-slope form, to linear elements of photographs. The applets are all the same except that each uses a different photograph. I also developed a worksheet to go along with the applets, and it is included at the bottom of each applet.

Graph

Graph, by Ivan Johansen, is a free, open-source program for Windows that allows you to quickly and easily graph functions while giving you a lot of control over the appearance of the output. The images can be easily pasted into a word processing document and I found that the quality of the printed output when I pasted into Word was quite good. An excellent feature is an option which will label tick marks with any specified multiple of pi.

In fact, the program allows you to do a lot more than make just pretty pictures. For example, you can graph (and obtain the equation of) the line tangent to a function at a specified point or fit a line to a set of points.

David Young's Interactive Mathematics Resources

David Young has developed a high quality collection of interactive resources, primarily, but not solely, for algebra and pre-algebra. My favorites are the Graphing Linear Equations modules, which teach and then provide guided practice in graphing by plotting points, graphing using intercepts, and graphing using the slope-intercept method. A student worksheet to go along with these modules is provided as well. There's also lots worth exploring here beyond the applets. For example, there is a nice PowerPoint template for Jeopardy-style review and a video which shows you how to create your own applet using the free and versatile Geogebra.