Courses for GAAP Standards and Accrual Basis Entries?

I run a bookkeeping firm for small business owners. I personally feel very comfortable with GAAP standards and accrual entries, but I'm not a great teacher. I'm looking for courses that will help my staff learn more about these concepts so that we can offer these types/levels of services to more clients with confidence.

Right now, my staff are regularly coming back to me with questions about these things. Not the end of the world, but it's not efficient and it makes it clear that I'm a better business leader than accounting professor.

Any and all help appreciated. TIA!