1. Leen Streefland's Legacy

   • Norma Presmeg
   • Marja van den Heuvel-Panhuizen

   OriginalPaper Pages: 1 - 4

2. Introduction: A focus on experiences - My experience with Leen

   • Willibald Dörfler

   OriginalPaper Pages: 5 - 7

3. The didactical use of models in realistic mathematics education: An example from a longitudinal trajectory on percentage

   • Marja Van Den Heuvel-Panhuizen

   OriginalPaper Pages: 9 - 35

4. Learning from history for teaching in the future

   • L. Streefland

   OriginalPaper Pages: 37 - 62

5. Focusing on informal strategies when linking arithmetic to early algebra

   • Barbara A. Van Amerom

   OriginalPaper Pages: 63 - 75

6. Classroom interaction as reflection: Learning and teaching mathematics in a community of inquiry

   • Ed Elbers

   OriginalPaper Pages: 77 - 99

7. Didactising: Continuing the work of Leen Streefland

   • Erna Yackel
   • Michelle Stephan
   • Diana Underwood

   OriginalPaper Pages: 101 - 126

8. Creativity, Mathematizing, and Didactizing: Leen Streefland's work continues

   • Norma Presmeg

   OriginalPaper Pages: 127 - 137