Check to see if your school board requires equipment to be specially electrically certified before using.
When I went to school any equipment that was to be used in an Ontario (Canada) school had to go through additional electrical certification...that included film projectors, TVs, VCRs (it was the olden days), plug-in radios,
etc. I remember every piece of electrical equipment I handled had an additional blue sticker on it like the following (I can't remember if this was the exact one, but it looks familiar):
A teacher couldn't just bring in a plug-in radio from home. I remember when we ordered a new multi-track open reel and
mixer for the school music studio we had to wait until it was tested and stickered before it was delivered to us.
p.s. I just remembered that part of this process included adding a
ground connection to the
plug if the device only had a two prong
plug. I found it weird in those days that devices that would normally have a
polarized line cord (like a consumer VCR) had a heavier duty 3-prong
line cord.