Expectations from Employees When They Come Back from a Training Seminar

I haven’t sent my employees to many training seminars outside the store because we offer our own instore training program—but every once in awhile there is a product’s understanding best learned from the company that produces the line. Any training program outside the store is pretty costly—so how does the store take advantage of what they’ve just learned. Do you set goals for the employees going? Do you test them when they come back to the store? How do you know they can now take what they’ve learned and increase sales? Why send them if they don’t come back armed with knowledge to sell more?