1. Problem length as a structural variable in verbal arithmetic problems

   • Max Jerman

   OriginalPaper Pages: 109 - 123

2. The concept of grouping in Jean Piaget's psychology — Formalization and applications

   • Erich Wittmann

   OriginalPaper Pages: 125 - 146

3. Using models of operations and equations

   • Floyd Vest

   OriginalPaper Pages: 147 - 155

4. Charles Godfrey (1873–1924) and the reform of mathematical education

   • A. G. Howson

   OriginalPaper Pages: 157 - 180

5. Quasi-Child Logics

   • Bernard J. Shapiro
   • Thomas C. O'Brien

   OriginalPaper Pages: 181 - 184

6. Teaching college Mathematics by question-and-answer

   • Robert A. Bagnato

   OriginalPaper Pages: 185 - 192

7. The march of the discoverer

   • Lyman Holden

   OriginalPaper Pages: 193 - 205

8. Sur l'assimilation des programmes de 6ème-5ème

   • Une Équipe De L'I. R. E. M. De Strasbourg

   OriginalPaper Pages: 207 - 242