1. The construction fo meanings for trend in active graphing

   • Janet Ainley
   • Elena Nardi
   • Dave Pratt

   OriginalPaper Pages: 85 - 114

2. The Design of a Case-Based Hypermedia Teaching Tool

   • Jeffrey K. Horvath
   • Richard Lehrer

   OriginalPaper Pages: 115 - 141

3. Modelling Hyperbolic Space: Designing a Computational Context for Learning Non-Euclidean Geometry

   • Ian Stevenson

   OriginalPaper Pages: 143 - 167

4. Two-Parameter Universes: Part 1 Consider a Rectangular Point...

   • Wallace Feurzeig
   • Gabriel Katz
   • Victor Steinbok

   OriginalPaper Pages: 169 - 178

5. Erratum

   Erratum Pages: 179 - 179