Sitting in class as a student, one of the last things you think about is where all of the classroom supplies came from. The school fairy, maybe?
But realistically, at least some of them probably came out of the teacher’s own wallet. The perks of being a teacher (educating future generations!) might outweigh the cost of staplers and bulletin boards, but isn’t it still alarming to see the financial hoops many must jump through just to do their jobs?