Tell your kids to each order one of these:
They're less than $40 and then they'll have a slave-capable 270-90 degree swivel head flash that has a wide angle diffuser and catchlight bounce card. It's not 38 GN like the description claims, but it is awesome for what each kid will spend on it.
It's fully manual too, so it'll teach them the proper way to balance strobe light with ambient using a light meter. A skill that is useful to everyone working in studio or on location. Making someone think about light without ETTL will make them much better photographers, the same way working with primes instead of zooms helps with composition, and working in manual instead of program/auto helps with understanding exposure.
That would be great, but majority of the students would not be able to afford this. I have a hard enough time getting the kids to pay the class fee. But I will mention it to them if they're interested. Just wish my school district could set up a PO with amazon so we could get everything that we need and so that my hs students do not need to spend money.
Is there a connection port for a cord?