That's a generous action you made. I hope it's not just a made up story since the thought of giving out something and also feeding them with knowledge would absolutely help those high school students in understanding and knowing cryptocurrency deeper. Spreading the knowledge and teaching them is generous enough but giving them a portion of bitcoin is just very rewarding for them and I believe will inspire them to collect more of it become a single unit of bitcoin.

Of course members here will expect for proofs especially you mentioned that you have sent on their non-custodial wallets. I believe that you can earn merit for posting those TX here  thus helping your account level up.