You'll still think this is below average, at best.
Positives: The acting was good, especially the actor playing the psychic. Decent premise.
Negatives: Incredibly boring. Not remotely scary and not even a jump scare. The extent of the "scares" are the ghost/demon/whatever it's supposed to be (because we never see it) tossing back a tennis ball and yanking a couple desks around.
I've seen hundreds of these movies, many of which I imagine had a similar budget to this. At least these other movies attempted (though likely failed) to scare you. This doesn't even bother.
I found myself thinking, ok so here we have a crew member tossing a ball into the hallway and here we have some other crew members yanking desks that they tied a rope to. Neat.
Review of Classroom 6
