Saturday, November 27, 2010

Another Geogebra Tutorial

Here is another Geogebra tutorial. This will teach a number of helpful skills that will apply to a variety of projects.

Monday, March 10, 2008

Saturday, February 24, 2007

Two Cool Applets for 3D visualization

I recently stumbled across these two applets for helping students with 3D visualization. The first one gives you a 3D object, and you have to manipulate it so that you are viewing the appropriate side view. The second one is slightly more complex. In it you have to build a 3d object based on its top, front, and side views. This is a perfect example of what I like to see in a virtual manipulative: the content is truly interactive, it is much easier than doing the same thing with pencil and paper, and although it does have a component of repetitve practice it is in the context of student manipulated content. I would suggest using them in the following order:

1) Rotating 3D shapes to see a particular side view:

2) Building 3D shapes based on side and top views:

Tuesday, February 20, 2007

Project Interactivate

Project Interactivate is from Shodor Interactive, and contains a very large number of java applets for use in math education. The quality of the applets vary from very good and inventive, to fairly limited. Browsing the "Activities" as a learner will show you all of the 100+ applets available, while browsing "Lessons" as an instructor will list only the applets that have lessons included with them.

National Library of Virtual Manipulatives

The National Library of Virtual Manipulatives is a a collection of math applets for k-12. The quality of the applets is very good and strengthened by the inclusion of structed lessons for many of them. The only limitation of the site is that while it does contain a large number of applets they don't go beyond the level of about Algebra I or early Geometry. Applets can be searched for by grade level and subject area, but you will soon find a lot of overlap between adjoining grade level areas.

Sunday, February 4, 2007

Geogebra Tutorial

As promised, here is a video tutorial of how to create a simple virtual manipulative in GeoGebra. You can watch the embedded video below, or follow the link to a higher quality version on my site.
Link to video: (Full Quality 5Mb Flash movie)

Link to the java applet created in the tutorial:

Sunday, January 28, 2007

Geogebra - The Future of Math Education - Geogebra is completely free.

This is going to sound like a paid advertisement, but I can not begin to explain the brilliance of this program. It is so good on so many levels that it is unreal. I recently had the priveledge to attend a presentation by the author of this program, Markus Hohenwarter at the Florida Educational Technology Conference in Orlando and was blown away.

Geogebra is completely free.

Geogebra is very similar to Geometer's Sketchpad. Unfortunately, my comparison between the programs has to end there as financial restraints have prevented me from ever being very familiar with that program. I would very much like to hear a comparison of the two programs made by someone with a lot of experience with Geometer's Sketchpad. Essentially, Geogebra it is a program for creating interactive mathematical diagrams that also include all algebraic expressions. The scope of the program is very broad, covering almost all functions and digrams covered in high school Algebra, Geometry and Calculus (I say almost only because I haven't used the program long enough to know for sure if it is lacking in any content). Additionally, Geogebra provides features geared towards promoting interaction with content. For example, sliders can be easily placed on diagrams and assigned to values.

Geogebra is completely free.

As if the mere existence of such a free powerful program was not enough, the program has been created in java making it available for use on any platform. As such, Geogebra allows the user to output diagrams as stand-alone java applets. The power of this feature is groundbreaking (yes, I know it was available in Geometer's Skethpad, but not for free). What this means is that any teacher will be able to use the program to easily create customized virtual manipulatives and interactive worksheets for their classroom. Many teachers are already doing this and contributing their content to the Geogebra wiki and user forums (see for these and other geogebra resources). Virtual manipulatives that would take me 10-12 hours to create in Flash can literally be created in minutes by someone with no programming experience whatsoever.

Geogebra is completely free.

It is my hope to have some video tutorials for the program completed in the near future, and you will find them here when they are ready. For now you need to do 3 things. 1) Download the program and start using it. 2) Tell every math teacher you know about it. 3) Support the free mentality that the program was created on by posting your lessons to the Geogebra wiki for other teachers to use.

Did I mention that Geogebra is completely free?