Which is why the individual chapters are so different. I was told that instructors are to be 'strongly discouraged' from elaborating on the canned package. It puzzled me because the feedback I got on my classes was always very good. Unfortunately, too many comments included reference to what I added to the program. Even though they were complimentary, it was a deviation from the program and I was asked to stop.
I have taught under AHA, ASHI and ARC. I currently only certify under ASHI because they allow me more freedom on how to teach to the established standard. I still take the updated AHA instructor course to remain up to date on their standards, but I no longer certify with them. Our local chapter was a bottleneck on processing cards and certifying instructors.