I find it hard to argue with someone I do not know even. I know my sentence is correct, yet I do not wish to debate about it as I am not an English teacher. I am only telling you not to claim things which are not true. The English that you use can pass well for a regular workaday lingo in the US. However, by no means, can you claim this will help anyone pass tests. Academic English is pretty different.

And yeah, there is nothing wrong if you can help people become more conversant in English and basic writing but that would not be for exams. You know what I am trying to say?

I am not trying to challenge you here. I am only trying to explain to potential students to understand what would getting English lessons from you be worth.

Your best students could be people who are not studying anymore, yet require English in their everyday life. For example, those who want to visit an English country for a vacation or business purposes.