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Recording
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GeoGebra is FOSS dynamic math software. Everyday I am amazed at the possibilities for learning that this software offers. Not show-and-tell, but try, explore and learn - anywhere because its free. And GeoGebra is continually being improved and users have influence.

The GeoGebra compass tool came at my suggestion. The reason? I was trying to teach my son constructions with a real compass and straightedge and kept having to erase and was tearing my paper (and my hair out). But I couldn't find any software where the techniques in the application and in real life were the same. With GeoGebra I could make my own compass tool. Then I wrote into the GeoGebra forum and the tool was added to GeoGebra.

But how to get the word out? How to show what can be done?

I won't read anything - I am an AV learner and I think many others are too. First, came a series of mathcasts - one describing the tools and then seven showing how to do the 7 basic compass and straightedge constructions with the steps corresponding exactly to real life construction. We opened the GeoGebra channel on YouTube and a playlist for Compass & Straightedge with GeoGebra and these mathcasts are available in HD and captioned (see above).

Second, some webpages with still images and GeoGebra worksheets. GeoGebra worksheets can be embedded in almost any wiki (see below). They are interactive worksheets so you can work on them online - even on a school LAN. No download or installation required. Or you can download and work offline without internet.  - Given a line segment AB and a line with a point P on it. Construct a line segment PS on the line that is congruent to AB. Interact in the worksheet by clicking and dragging any **blue point**. You can watch the construction by clicking on Play. You can delete everything and make your own construction. And - if you have GeoGebra - you can double-click and save your changes to your computer. media type="custom" key="5239155"
 * 1 Construction - Copy a line segment**

You can embed animated GeoGebra files in Wikispaces. Click on the Play button (bottom left) or click & drag the slider s. [|Resource] media type="custom" key="5445221"

This event is a part of the ongoing Math 2.0 interest group conversation series. Always-discussed topics: code format="html4strict"
 * principles of Math 2.0 teaching and learning
 * networks and communities creating social math objects
 * platforms for remote communication of this interest group
 * our projects and collaboration
 * publishing efforts and bibliography

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