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The proposed workbook is an author's development for the course "Ecology" in grade 3. The authors provide tasks for learning, testing and controlling environmental knowledge. Various tasks using drawings, diagrams, tables will contribute to the development of memory, attention, logical thinking of third-graders, expand children's understanding of environmental problems and environmental protection measures. Kalinka helps in this, whose images are found on the pages of the manual.

The workbook is designed to organise the work of 3rd grade primary school students in class and at home.