Hi Tim: It's always amazing how much helpful information others have if they feel it is being solicited for honest and open improvement for students. Perhaps a slightly different spin on this creative idea would be to seek both kinds of tools, ie., those that have worked successfully, and those that have bombed (I'd especially want to know about those!). Of course, not every group is going to respond the same way. Experience is having your mistakes behind you. That is, you're more comfortable with what usually works and what usually flops based on past trials and successes. Regards, Barry