MH, the best class that I was ever in was put on by an appraiser that taught appraisal classes to new appraisers. The bank asked him to put on a training session for 4 hours on a Saturday (and paid him). He brought in examples, and an understanding of what appraisers could do and how appraisals could be manipulated.
The class was awesome, the handouts great and there were lenders, processors, audit, fraud and compliance personnel. The regulators were happy and the internal reviews were a lot better. Appraisers actually stopped giving us second-hand work when the bank knew what questions to ask, and where shortcuts might be taken. Check for an instructor with your local appraisal board.
Integrity. With it, nothing else matters. Without it, nothing else matters.