1. Guest editorial

   • Tommy Dreyfus

   EditorialNotes Pages: 93 - 95

2. The advance party

   • David Pimm

   OriginalPaper Pages: 97 - 122

3. Unpacking the logic of mathematical statements

   • John Selden
   • Annie Selden

   OriginalPaper Pages: 123 - 151

4. Learning group isomorphism: A crossroads of many concepts

   • Uri Leron
   • Orit Hazzan
   • Rina Zazkis

   OriginalPaper Pages: 153 - 174

5. Meta level in the teaching of unifying and generalizing concepts in mathematics

   • Jean-luc Dorier

   OriginalPaper Pages: 175 - 197

6. Project work in university mathematics education

   • Renuka Vithal
   • Iben Christiansen
   • Ole Skovsmose

   OriginalPaper Pages: 199 - 223