1. Relations between Types of Reasoning and Computational Representations

   • Orit Parnafes
   • Andrea Disessa

   OriginalPaper Pages: 251 - 280

2. Managing the Complexity of Human/Machine Interactions in Computerized Learning Environments: Guiding Students’ Command Process through Instrumental Orchestrations

   • Luc Trouche

   OriginalPaper Pages: 281 - 307

3. On the Integration of Digital Technologies into Mathematics Classrooms

   • Celia Hoyles
   • Richard Noss
   • Phillip Kent

   OriginalPaper Pages: 309 - 326

4. Teachers’ Activities in Technology-Based Mathematics Lessons

   • John Monaghan

   OriginalPaper Pages: 327 - 357

5. Reflections on Reflections

   • Peter Liljedahl

   OriginalPaper Pages: 359 - 369