Thank you for that SYNACK, some specifics would be useful where you think the programming is particularly egregious. Also, there is a specific difficulty with AppInventor. Have you explored that at all? I think the issue maybe the way the application interacts with the google systems but I am fairly confident that it was not written by a retired teacher. A problem that should decrease for you with the new pension rules as most of them will die of a heart attack in the classroom long before retirement.
Hey, maybe the RBS systems were written by retired teachers!
Here is a cry for help that I have received on the CAS forum, your suggestions would be helpful I am sure.