1. Editorial

   • W. Dörfler

   EditorialNotes Pages: v - v

2. Guest editorial

   • Alan Bell

   EditorialNotes Pages: 1 - 4

3. Principles for the design of teaching

   • Alan Bell

   OriginalPaper Pages: 5 - 34

4. Different aspects in designing mathematics education: Three examples from the Freudenthal Institute

   • Jan Van Den Brink

   OriginalPaper Pages: 35 - 64

5. Powerful tasks: A contribution to a high level of acting and reflecting in mathematics instruction

   • Konrad Krainer

   OriginalPaper Pages: 65 - 93

6. Connecting theory and practice: Results from the teaching of Logo

   • Rosamund Sutherland

   OriginalPaper Pages: 95 - 113

7. Some experiments in diagnostic teaching

   • Alan Bell

   OriginalPaper Pages: 115 - 137