How to say it correctly ?
Yes, it's take a course. But using slang you can say do a course. Samir - in North America you can do a course too.
Khaterina - in English you have to say, "How do you say it correctly". Russian is easier here - I'm thinking that it is something like "Как сказать........ Could you complete/correct it for me (I don't know how to say "correctly".
Take a course