It amused me, early one school year, when one of my high school science teachers had to clarify how the conclusion of a lab report should read.
"A conclusion is supposed to state what the experiment proves," she said. "You'd write, for instance, 'When this chemical combines with that chemical, such-and-such happens.' You wouldn't write, 'This experiment was fun and educational.'"
You'd think it wouldn't be necessary to clarify such a thing, but...
