Exporting and Sharing
Export the graphics view as picture
The easiest way to input pictures into a text-document is to use some regular screen
capturing tool, like pressing the print-screen-button. In order to capture just a part
of the screen; use the Snipping Tool if using Windows 7, press Cmd
+Shift+4 if using Mac, and use
Applications->Accessories->Take Screenshot if using Ubuntu.
You can also export the Graphics View to Clipboard under the File-menu, paste it into a document and then rescale the image afterwards.
Use File->Export->Graphics View as Picture to save it to a file or to the Clipboard. You can scale the
image and change the resolution.
Zoomable pictures
Highly regular images like mathematical graphs, seldom look good when zoomed. If you are using a presentation program like Prezi, png-pictures will not look good, even if you make them large and use a high resolution. If you don't need a transparent background, and if you can cope with the pdf-dimensions, the best format is pdf. This is a Prezi demonstrating the difference between png and pdf, the difference is more striking when showing graphs.
The pdf-format is not really a scalable format. If you need a truly scalable format, export to svg. The background to this section is a svg-file made in GeoGebra, it is the same picture as the small ones above. The difference between svg-pictures and regular pictures is shown if you use the web browser to zoom in. Pictures in the svg-format are mainly used on the web, most other applications can not handle them.
Using GeoGebra-media
When making instructions to students, you may need to refer to the tools or buttons in GeoGebra. All icons used in GeoGebra are available for downloading. You can find the icons for buttons at the page http://wiki.geogebra.org/en/Category:Buttons, and the icons for the tools at http://wiki.geogebra.org/en/Category:Tools_Icons.
"You are what you share"
Using GeoGebra 4, you can share your worksheets on the GeoGebraTube.
Pick File->Share! You need to either register as a GeoGebra user, or you can use an existing Facebook or
Twitter account. When uploading a file, you can write text to be seen above and below the applet;
you can also add a description for other teachers, add tags etc. If you make several applets with a common theme, you can gather them in a collection.
It is also possible to specify url-addresses containing GeoGebra-material. You share your work by providing a link to your
GeoGebraTube Profile, like this; or by providing
a link to a specific worksheet, like this. The visitor
will see the worksheet as an applet and will also be able to download the GeoGebra-file.
Export as webpage
Even if you don't have access to a server where you can publish a html-file, there may be times when the html-format is handy. If you can distribute the html-file to students, it will open in a web browser when double-clicked. Using a html-file, you can hide the construction and show whatever you want to reveal.
Choose the option File->Export->Dynamic Worksheet as Webpage(html)
to create a html-file. Input a title which will be shown
at the top of the web page. Input text that will be written above and/or below the construction.
Choose export and name the html-file.
Under the tab Advanced you can change the functionality and the user interface.
The size of the applets
The size of the applet can be seen when clicking the Advanced tab under Export as Webpage. Web sites are viewed from a number of different devices and it is very common for schools to use Netbooks. If you want your applet to be viewable by students world-wide, don't make applets larger than 800 in width and 480 in height. A list of data for various Netbooks is shown here. At Google labs they have made a web page where you can test and see what percentage of the viewers world-wide can see different portions of any web page. This is the Google labs site where you can enter any url.
GeoGebra 4.2
Using the beta version GeoGebra 4.2, you can export a worksheet to work on mobile devices. If you check the "Include HTML5" box, the code generated will be Javascript code, which will work on mobile devices. Only the graphics view can be exported to the Javascript generated code

references:
"You are what you share" from We Think by Charles Leadbeater
by Malin Christersson under a Creative Commons Attribution-Noncommercial-Share Alike 2.5 Sweden License