Click on 'Home' then scroll down to get to information about the history of many of the programs on this site and to see which programs have been recently updated or added.
If you want to contact me for any reason, use the 'Contact' form or e-mail me at the address below. Please let me know if you see mistakes on this site.
Click on 'Programs' to find links to all of the programs that are on this site. Most of the programs are related to math, but you will also find several related to color, a couple related to perspective, a drawing program, and more. Try out the Alien Arithmetic program in the Arithmetic area to have fun thinking in a different base.
Click on 'SCORM' to learn about Shareable Content Object Reference Models, what they are, why they are useful, and how to make your own.
The 'About L2 page gives you information about how I got the nickname L2 and why I work on this site and the programs that this site contains. I also occassionaly update the page to let you know what kinds of things I am working on now or planning on working on soon.
Click here to find some of the static handouts and worksheets that I have created for the math classes that I teach at Lansing Community College.
Click here to see a history of most of the programs on this site and to subscribe to the RSS feed if you wish to receive notices when a program is improved or a new program is made.
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Move the left focal point and the directrix to change the eccentricity and see how it affects the shape of the conic. What eccentricity gives you a parabola, an ellipse, and a hyperbola? Do you ever get a circle? If you are a student, discuss this with other students. If you are a teacher, this is a good program to project onto a screen or board and demonstrate to the class.
The original size of the program is four times larger than above. You may want to click on the link to open the program in a separate window.Created: July 25, 2010