2004: The beginning with GeoGebra version 2.x
Markus Hohenwarter develops GeoGebra in the context of his doctoral thesis at the University of Salzburg. During this time I created dynamic drawings on realmath.de with the dynamic software EUKLID-DynaGeo. One day Markus Hohenwarter contacted me by e-mail and asked if I would like to use his java-based software GeoGebra for the dynamic drawings on realmath.de. I declined, because at that time GeoGebra could not be operated via button input but only awkwardly via commands. Three days later the new control for GeoGebra, as it is known today, was ready. Impressive speed!
What started now, I would like to call a ping-pong effect. This manifested itself in the fact that I maintained my rejection for GeoGebra and always pointed out programming backlogs. These were repaired by Markus in shortest time, but I referred again to further construction sites. Here a small excerpt:
- No mathematical texts possible
I reminded that e.g. lengths of distances or the notation of vectors could not be integrated into the drawing in the form used in school. Within shortest time Markus programmed this application. The forefather of the latex connection was born.
- No scale printout possible
I pointed out that teachers for the use of dynamic software attach great importance to a scaled printout. Better yet an output to the clipboard from which the drawing can then be integrated into any word processing program. From my previous conversations with java program developers, I knew that this would probably not be possible. But Markus had a brilliant idea here, too. He programmed an export via images in png format, like you can still find in GeoGebra today.
2006: The breakthrough - Bavarian secondary schools with GeoGebra version 3.x
October 4 - 6, 2006: Conference of the seminar teachers for mathematics at Bavarian secondary schools in Dillingen, lecture on GeoGebra and workshop on interactive dynamic worksheets with realmath.de.
Looking back, this event can be confidently called the starting signal for the use of GeoGebra at Bavarian schools. The lecture and workshop with GeoGebra was a terrific success for GeoGebra. The enthusiasm of my former seminar teacher colleagues was extraordinary. Finally an application that meets all school requirements. So the program of the conference was changed at short notice and I was asked to hold another workshop with the in-depth use of GeoGebra. From then on, the seminar teachers acted as multipliers.