Bērtule, Dace, and Dace Namsone. “COGNITIVE DEPTH OF TEACHING AND LEARNING PROCESS IN BIOLOGY FROM 7TH TILL 9TH GRADE”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, vol. 2, May 2018, pp. 54-62, https://doi.org/10.17770/sie2018vol1.3224.