Mix it up. Use a combination of different media - like classroom training
with a video, or a print manual with an online bulletin board for peer
troubleshooting - for an effective learning experience.
Bargains happen. Don't judge the quality of the training material by its
price.
Time out. Look for training programs that space sessions out, or separate
sessions with different lessons. Long, massed training periods make employees
lose interest or get burned out.
So they all got A's. Don't judge the success of a training program on
performance scores at the end of a session. How fast students learn doesn't
indicate what they'll be able to apply on the job.
People learn what they DO. Make your employees apply their newly-learned
skills in real world situations immediately.