Dynamic worksheets: visual learning with the guidance of Polya

More than sixty years ago Polya developed a guideline for describing problem solving processes. He suggested four phases of problem solving such as understanding devising a plan carrying out the plan and looking back [7] which is still applicable to many instances.

We attempt to take a journey with the guidance of his suggestions in a dynamic learning environment GeoGebra. GeoGebra is a dynamic learning environment which allows users to create mathematical objects and to interact with these objects. The users of GeoGebra either teachers or students can use this environment to explain to explore and to model mathematical concepts and the relationships between mathematical concepts or mathematics in general.