I agree with everyone up there! A jump strap is great, and we had them growing up, but when I started teaching, I found that using the mane is a better tool. You take the jump strap off and students almost freeze because it's not there to hang on to! Have you thought about a gymnastics line - maybe a couple of 1-strides or bounces together to kind of get a feel for the horses natural flow? Good luck with it and let us know. I'm new here and anxious to see and "hear" everyone's ideas.
I LOVE the WIGGLE! I'm going to try that with a few riders this week.