It brings us joy to hear that there are more and more schools adopting STEM and STEAM programs. Those kinds of programs are what got some of us through school!
I like to recommend the Creality machines like the CR-20 as they are really cost efficient and for the most part simple to use.
The CR-10's are always a good choice as well with them being more basic in terms of options. Our Sales team does know where schools tend to lean to in terms of printers better than I do though. I might recommend to give them a call for just gathering information.