I thought your students would be much older than mine. I only have 45-mins to an hour on each session so I needed to have tutorial sessions that could be fitted in to this time frame. Our set-up is a couple of towers of RPi-Zero-W, 6 Pi(es) in each tower, that commuicate to the Club's router and out through a hole that the IT people punched in the web-filter for us.
I've made up 24 or more breadboards that each have a Wemos D1 Mini running ESP-Easy. The students are given a breadboard and a tutorial guide and build things incorporating LEDs, push buttons, ultrasonic distance measuring devices, temp/humidity/pressure sensors, accessing weather data, writing data to MySQL dB, some of my advanced students did some aircraft tracking and displaying the position of trains on the UK British Rail network.
When I get a spare moment I'll send you a could sample tutorials.
Thanks for taking the time to read this.