Great effort and I will contribute. But, and here I'm just saying. If you want this to take off, might you not be better off with single shot 22s? Its, cheaper, safer and helps the image issue that might make some schools leery.
SS .22 LR is what the BSA uses so there is already an established youth program to model from.
Likewise it might make parets more supportive.
Finally it will sure trim the ammo bill and the cost of rifles.
You'll still teach basic marksmanship and hopefully help re-introduce youth shooting as a safe wholesome pass time.
On the other hand, three gun is much cooler.

Good luck either way and keep us posted.
FQ13 who thinks you are doing a great thing.