Keyword: «the activity approach in teaching»

The article describes the experience of the team competition on the geometric design containing the problem of open and semi-open type and is based on the principles of the activity approach to teaching mathematics. A version of the work for pupils of 8-9 classes, which was proposed by the students as part of the day of physical and mathematical knowledge of innovative educational project "Days of scientific knowledge" in the lyceum number 21 of the city of Kirov.