After a year of trial and error (and a few embarrassing moments in front of the class), here's what I wish someone had told me:
1. Size actually matters. No, really. If your classroom is big, a small screen means the back row can't see anything. If it's too big for a small room... well, it just looks ridiculous. Measure your space before you buy anything.
2. It's not "set it and forget it." These things need updates, just like your phone. Don't ignore those pop-up messages – they're usually fixing something important.
3. The kids will break it if you let them. I learned this the hard way. Set ground rules: no poking with sharp objects, no leaning on it, no throwing things at it (yes, that happened). Treat it like the expensive equipment it is.
4. Training isn't optional. If your school buys this stuff but doesn't train teachers, it's a waste of money. Ask for proper training. Demand it if you have to.
5. It won't magically make you a better teacher. Sorry to burst the bubble, but tech is just a tool. You still need to plan good lessons. The screen just helps deliver them better.
Bottom line: tech can be amazing, but only if you actually know how to use it. Don't be afraid to ask for help – we're all learning here.