try putting light bungie cord on the back of a creeper and hooking it to the wall. The student has to apply pressure to the wall evenly with his feet during dive flow practice to keep the creeper away from the wall. Students get used to applying pressure in the correct direction and build muscle memory of the right way to fly instead of fighting gravity on the ground and relative wind in the air. The wheels have to be well lubricated and the floor smooth. Later take thier hands and pushing/pulling themselves forward gives them a natural reference for forward motion.