The specialists of the State Nature Sanctuary “Ashit” replaced the standard biology lesson by an interesting quiz. The class was divided into two teams, each of which had to show its knowledge in biology and ecology. Before starting the competition, the sanctuary specialists told the children about the importance of the water protection zones in the ecological system and why this year they are given so much attention. At the end, the winning team was awarded a diploma of the State Nature Sanctuary “Ashit”.