I can see where this would be useful if you combined it with some type of "name brand" program. Measure velocity before and after a Driveline weighted balls or Jaeger long toss throwing program. Maybe offer both and compare? This would give some initial interest. They both have "free" versions. See what gives you some results and you can blow the program's improvement horn to get interest next year.
Maybe a Driveline heavy, light, bat swing training program, etc. Maybe get a local swing guru to get involved to tout his program.
Get a track coach to help work on sprints or just get a sprint program from someone.
Lot's of options to encourage participation if you can prove results.
Here is a link to "recommended" measurables.
https://www.tpcollegeshowcase....nce-information.html
Just because kids get these numbers is not a guarantee. Just a reference.