I know it may not make sense but I would look at Flite Test. They offer a STEM program with "kits" that are class sized. There is a video that gives step by step on how to build their planes, setup other tips and tricks. They have done all the homework for you. Maybe you could possibly sell some of your current supplies to fund the Flite Test curriculum??? Here are some links for you to follow.

https://store.flitetest.com/arrow-class-starter-kit/

https://www.ftstem.com/curriculum

Flite Test Beginner Series | AMA Flight School

Tiny Trainer build video.
Ken