1. The Calculator as a Cognitive Tool: Upper-Primary Pupils Tackling a Realistic Number Problem

   • Kenneth Ruthven
   • Di Chaplin

   OriginalPaper Pages: 93 - 124

2. A Learning Environment for Mental Visualization in Electromagnetism

   • Miriam Reiner

   OriginalPaper Pages: 125 - 154

3. Constructing the Complex Numbers

   • Al Cuoco

   OriginalPaper Pages: 155 - 186