Download GeoGebra

You don't have to be an administrator to install GeoGebra but you need Java (GeoGebra is not run from binary code but from Java Virtual Machine). You can download Java here. You must be an administrator in order to install Java. Most schools have Java installed on the computers; if not, tell your system administrator to install it!

You can download GeoGebra from http://www.geogebra.org/cms/. Click on Download

Then click on Webstart. This option downloads and starts GeoGebra on your computer (information about GeoGebraPrim is given further down on this page). After the download, you can run GeoGebra even when you are not online.

Some browsers download and start GeoGebra automatically. Other browsers give you two options. Click on "Open" to download and start GeoGebra.

If you use Windows or Linux, a GeoGebra-icon is placed on your desktop. If you use Ubuntu, you can also download GeoGebra through Ubuntu Software Center, GeoGebra will be placed under Education. If you use Mac, the file geogebra.jnlp will be placed wherever you keep downloaded files; you will then get the option to place the application (GeoGebra4.app) wherever you want it.

If you don't get the option shown in the picture above, it is because you have deleted an old installation of GeoGebra without clearing the Java cache. In that case, follow the instructions from the troubleshooting link below, you find the Java Preferences under Applications->Utilities.

If you don't want to download GeoGebra, choose the option Applet Start instead of Webstart. GeoGebra will then run in your browser.

If nothing works, it is probably because you don't have Java installed at all, or because your Java is of an outdated version.

GeoGebra's web site also has an excellent forum and a Wiki. Old versions of GeoGebra can be downloaded from http://www.geogebra.org/webstart/history/.

For troubleshooting, see FAQs: Installation & Troubleshooting.

GeoGebraTube

The main feature of GeoGebra is interactivity. Since static documents such as text-documents can not capture the spirit of GeoGebra, and since most teachers/students don't have a web site of their own; it is possible to post your working to GeoGebraTube. GeoGebraTube resembles YouTube in the sense that you can share your material on Internet, the material shared is however not videos but so called GeoGebra worksheets. Worksheets on GeoGebraTube are shown as interactive applets. It is also possible for visitors to download them.

In order to share your worksheets on GeoGebraTube, you must either register to make a GeoGebra user account, or use an existing Facebook or Twitter account. You can post your material by uploading it directly to the GeoGebraTube web page, or by choosing File->Share from within GeoGebra. Once posted, you can share it by providing a link to your GeoGebraTube User Profile, like this: http://www.geogebratube.org/user/profile/id/730.

If someone else is the administrator of the computer you must use, and if someone else ignores the fact that you can't view applets on your computer, feel free to use this applet to send someone else a message: Assessing the ICT-policy at your school.

GeoGebraPrim

When you download GeoGebra, you can choose between the regular version, Webstart, and the GeoGebraPrim version.

GeoGebraPrim is made for younger children, it has a reduced toolbar and the text is larger.

GeoGebra 4.2

Version 4.2 of GeoGebra is the next version to be released. At the moment it is still a beta release which you can download from this forum.

With GeoGebra 4.2 you will be able to use CAS (Computer Algebra System). It will also be possible to produce GeoGebra worksheets for the web as Javacript code instead of Java applets, thus enabling using worksheets on mobile devices. An example can be found on this link.

This web site

The animated gif below, switching between a happy face and a heart, is made from the equations below using GeoGebra 4.0. The applet is shown at GeoGebra Tutorial - Curves.