Well you are wrong.
Facts are observable. "A rock drops to the earth" is a fact. Facts can be replicated and reproduced. I can drop the rock, you can drop it, anyone can and get the same observational results.
Facts are grouped into principles. "All things when dropped, fall to the earth." That is an example of a principle. It comes from the facts that we all can replicate and can be supported by experimentation.
"Gravity is the force that causes objects to be attracted to each other"-- a theory to explain the principles and facts. Theories, and principles can only be supported or disproved. They are never proven by experimentation.
Evolution is also just a theory. That being the case, it is appropriate that the school board wants children to understand that evolution is only a theory.