Convince your team to realize these simple truths........
push to go up, and wait to go down vs. reach to go up and reach to get down
falling off and climbing back up are just as tiring as doing the skill correctly with maximum effort
spotting (ballet style) has *not* gone out of style
the energy spent trying not to fall exceeds the energy spent moving confidently while working hard to keep centered, aligned, and maintaining good posture
every moment counts
Nail your warm-up drills........
Convince them the drills done at the beginning of beam workout provide the foundation for working confidently on beam, and that every moment can, eventually, be done exactly as well as can be imagined. Preach to them that every hop, skip, jump, and running step includes a take-off and a landing, and the sooner they perfect their warm-ups...... the sooner beam will make sense and become an easy event to hit and score on. Really, when you think about it, most kids learn their beam skills, on floor, 1-3 years before they ever train them on beam.
So come up with 15 minutes of simple drills that require little height, but still put them into leap/jump take-off and landing positions. Require, during warm-ups, that no one stops for water, questions, or chatting, and that includes every coach in the gym, because you can't ask the kids to make it "special" unless you and the other coaches in the gym make it "special" by focusing only on those drills.
Sorry if that got a bit rant-ish, but there's no way you can get kids who flop through their drills to learn solid skills.... including leaps.