Playing with this Adafruit motor controller shield... time to start using some Stepper motors in class. The weekend is so short... so maybe between class on Monday... https://learn.adafruit.com/adafruit-motor-shield-v2-for-arduino
This is the one I'm trying to get connected. It's a 6 wire Uni-polar we liberated from it's confines in an old printer. Did you know, a big office printer has 3-4 nice sized Steppers, 4-6 DC motors and a whole bunch of position encoders... this is just one we pulled.