Dr. Ehmke has given links to some of his work (mostly in german):

1. Proposal for the Fourth Learning and Instruction Symposium JULIS‘01 Joensuu Oct. 26 and 27 2001:
Different kinds of interactive exercises with response analysis on web-pages

2. The ICTMT 5 Contribution (Klagenfurt 2001)
Geometria: A Tool for the Production of Interactive Worksheets on the Web

3. Information and Examples of Geometria are downloadable under
http://www.geometria.de

4. Online-Course and Exercises about elementary geometry:
http://www.uni-flensburg.de/mathe/zero/veranst/elemgeom/elemgeom.html
http://www.uni-flensburg.de/mathe/zero/aufgaben/_elemgeom/_elemgeom.html

5. His Dissertation (> 400 pages in german)  you can download at:
http://www.uni-flensburg.de/mathe/homepg/schreiber/download/diss_ehmke.pdf

6. Interface between Java and JavaScript in Geometria is realized with help of the LiveConnect class
from Netscape. Examples under
http://www.geometria.de/eigene_funktionen_mit_javascript_definieren.html



Some more links

The original Geometry applet by David Joyce:
http://aleph0.clarku.edu/~djoyce/java/Geometry/Geometry.html
Euclid's Elements dynamically:
http://aleph0.clarku.edu/~djoyce/java/elements/toc.html

A quick intro online course to JavaScript you find under:
http://www.internetix.fi/atk-tuki/opinnot/in Finnish
http://www.teamone.de/selfaktuell/
(in german, french and spain)

A quick intro booklet to Java is:
Flanagan, D.: Java in a Nutshell. O'Reilly Thomson 2000.

Sebastian Liskenin Seminaarin tiimoilta aikaansaatuja töitä / Products inspired by a previous seminar by Sebastian Lisken