At primary school level more yes for math than science, it is about the symbols, logical operation, and basic understanding, but as you progress into high school you learn fundamental concept and definition. These words are defined in English more than they were in BM. This is very important because concepts and definitions are basic structures which you used in higher learning. It is expected that you are not troubled by the jargon and precise definition, but only the knowledge and learning thru reasoning and argument. If you are troubled, then your learning will be reduced.

How do you introduce these math and science definitions/concepts in an English class then?