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