1. Some didactical and Epistemological Considerations in the Design of Educational Software: The Cabri-euclide Example

   • Vanda Luengo

   OriginalPaper Pages: 1 - 29

2. Validation of Solutions of Construction Problems in Dynamic Geometry Environments

   • Gabriel J. Stylianides
   • Andreas J. Stylianides

   OriginalPaper Pages: 31 - 47

3. Students’ Activity in Computer-Supported Collaborative Problem Solving in Mathematics

   • Tarja-riitta Hurme
   • Sanna Järvelä

   OriginalPaper Pages: 49 - 73