Strategies for problem exploration / Ira Ewen
Unconventional problem-solving strategies in mathematics instruction / Alfred S. Posamentier
Interest grabbers : exciting motivational problems with punch and personality / Steven R. Conrad
Check the answer, please! / Mario Salvadori
The logic of error / Ethan Akin
Trial and success / Fred Paul
Reduce, expand, and look for a pattern / Stephen Krulik, Jesse A. Rudnick.

The pigeonhole principle for problem solving / Alfred S. Posamentier, Wei Lee
Handling, seeing, and thinking experiences in mathematics / Evan M. Maletsky
Problem solving as a continuous principle for teaching : suggestions and examples / Hans Humenberger, Hans-Christian Reichel
Another view of combinatorics (or counting without really counting) / Stephen E. Moresh
Problem solving by the use of functions / Wolfgang Schulz
Symmetry saves the solution / David Singmaster.

An application of congruence transformations in problem solving / Jan Troják
Graph theory : tools to solve mathematical problems / Wei Lee
A different solution for problems with extreme values : a didactic journey into the world of Jakob Steiner's ideas / Karl Kiesswetter, Roland J.K. Stowasser, Lenni I. Haapasalo
The problem of the duplication of a cube / Hans K. Kaiser
Solving mathematical problems using game strategies / Marion Kauke, Sabine Ziller.

Cooperative learning approaches to mathematical problem solving / Hope J. Hartman
Problem solving and the mathematically gifted student : a psychological perspective / Brigitte A. Rollett.