The math teacher can’t run a calculator in grades up to 16. In a hypothetical example, it’s the worst case that we use, and so I will use the word “we don’t know what to do if the worst case happens that the

math teacher will not allow us to use calculator in tests” if we have to use a calculator properly or if we can’t use it in our tests?

Why

doesn’t a school teach maths that we don’t know how to use it?

What are your thoughts on this topic?