Methodological ideas described below are suggestions for lessons which can be carried out in the 1st, 2nd and 3rd form of secondary school. Their subject matter is directly connected with the curriculum for the III and IV stage of education (middle school and secondary school) as well as with the standards of exam requirements. These suggestions and methodological ideas for teachers combine factual knowledge with practical use of the Internet.

How is it possible that they are moving?
Geologists think that this is due to wind and mud but wind can’t move stones which weight as much as human. Some people think that this happens because of  freezing water at night in winter, which creates ice sheets.
Widespread winds in Death Valley are able to move the stones.

Student:
- is familiar with the concept of polyhedron;
- recognizes and names spatial solids;
- shows practical use of spatial geometry in everyday life;
- finds elements of geometry in different fields, e.g. in chemistry, architecture, nature;
- uses simple calculation to establish the volume area and surface area of geometric models.

Student:
- is familiar with the concept of polyhedron;
- recognizes prisms and pyramids among polyhedrons;
- distinguishes polygons and knows their properties;
- distinguishes regular polygons;
- is able to define the concept of regular polyhedron, distinguish and name a particular polyhedron;
- is able to describe properties of every platonic solid;

Procedure:
1. Warm-up activity:
The teacher asks the students some questions :
„How often do you go to the theatre?”
„Do you like going to the theatre?”
„Do you read reviews before seeing a play?”

While-stage activities
1.The teacher divides students into two groups. Each group is to choose a leader whose task will be to present the results.
2.Instruction for the groups: Each group is to plan a trip to London and find information on means of transport, accommodation, and interesting places that are worth visiting. Each group should take the following things into consideration: