A chemistry teacher told a math teacher, "there's nothing in this classroom made of pure calcium." The math teacher looked around, then picked up the thickest piece of chalk and hurled it at the chem teacher. It hit him above his eye, and a bruise started to form.
The chemistry teacher looked down at the chalk and then back at the math teacher and said, "that's a salt."
I've always thought kids being able to draw on the sidewalks at school is only teaching them that vandalism is okay...
but I guess it could be chalked up to freedom of expression...
