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Or just need a refresher course on what goes into one?

Our problems with him began when he returned to his training school for a refresher course.

Mind you, I didn't have time for a refresher course, we just had to get on with it.

Low will provide his team with a refresher course anyway.

Take a driving refresher course every few years starting about age 65.

We've all been getting a refresher course on these earlier elections.

He does not need refresher courses after a week or two off.

That lesson had been learned, and she didn't need a refresher course.

If somebody doesn't already know why they shouldn't murder a baby, it's not clear that a refresher course will help.

And he didn't need a refresher course to remind him of it.