When starting to teach a new module at the school I teach at I almost always approach other teachers in that class about projects and grading, however once I covered a new class on the first day of lab, assuming it would be simple considering my experience and the fact that it was an advanced class with a veteran instructor. What a mistake. Total disaster. First the training aids were at a certain level of disrepair that advanced students should be able to work on, unfortunately on the first day of lab they need significant guidance and I was severly outnumbered and unprepared and swore never to teach that class again. After class I ran into another veteran instructor and told him what had happened. He told me what he would have done and how he would have handled it and it reminded me of something I knew from when I was a dishwasher in highschool. You gotta have a system. In that class every training aid had to for example be turned "on". After being turned on they had to be "initialized". After that they needed to be checked for "operation". Then they could be operated and tested for repair. If I had had every member of the class working on the same step on every one of the training aids instead of having them working on random steps throughout the process, I would have been able to manage many training aids and students on the same step as opposed to having to many students with to many problems on to many different projects at the same time. Start everyone at the beginning, be sure for your class you know what the beginning is, and build your class from there step by step.