This article presents the results of the study determining the education entities’ attitudes toward trilingual teaching in schools of Kazakhstan and the extent of their participation in the transition to teaching NMC subjects in English. The authors of the paper have provided some results of online monitoring study conducted among teachers, parents and students of 7-11 grades. Online survey, statistical manipulation, systematization and interpreting of obtained data served as the main research methods of the present study. The results of the conducted research reveal that the promotion of the trilingual education ideas in Kazakhstan is no longer a trend, but it is a “way of life” for the majority of students and teachers in the country. The support for teaching NMC subjects taught in English is an obvious phenomenon nowadays in Kazakhstan. The materials of this article may be essential and beneficial for the researchers of multilingual education issues, as well as for comparative studies in the field of English teaching.