In Andrew's defense, even after a beeyard demonstration of mite sampling techniques the great majority of students choose a no sample/no treat or treat by the calendar approach. I also regularly get asked 'when do you do splits?' I'll start to describe the conditions that I look for.....and midstream they'll stop me and ask for a date.
As I said earlier.....few will ever really get a passion and consequently the understanding of the dynamics at work. And, I believe, you simply have to accept that or stop teaching. A bit like I tell new beekeepers....'you have to harden your heart if you plan to keep bees....no matter what you do some will die'. A similar thing applies to teaching....some will soak up everything they can and some never will....and there isn't anything you can do to change that. Just be satisfied with those who get it.
Experience is a hard teacher because she gives the test first, the lesson afterwards
If you read some of the USDA publications on agriculture and animal husbandry you will find some pretty in depth information on the dynamics of their subjects - but you also find the "treat by the callendar" approach as well. Not Everyone who is into this stuff has a burning desire to learn all that there is to know. They can still to it though.