I attended the _________________ that you sent me to last _________________, and I feel it was one of the most valuable educational experiences of my career.
The instructor was extremely knowledgeable and was able to convey what that knowledge in a lively and entertaining manner. _________________ engaged us in questions and thought-provoking discussions and dealt with the full range of trainee concerns.
In addition, the _________________ was quite useful. I have the _________________ sitting on my desk even now, and I intend to refer to it frequently during the coming months.
Thanks for sending me to such a great program — I look forward to putting my new skills to work!