Realizing the problem-solving phases of Pólya in classroom practice

When teaching mathematical problem-solving is mentioned, the name of Pólya György inevitably comes to mind. Many lessons are planned using Pólya's steps and helping questions, teachers often rely on his heuristics even if their application happens unconsciously. In this article, we would like examine how two phases, Making a plan Looking back, can be realized in secondary school mathematics lesson. A case study was designed observe analyse lesson delivered cooperative work.
 Subject Classification: 97B10, 97C70, 97D40, 97D50