Tell your teacher this: "I passed a test that took 60 minutes. It wasn't your work, it wasn't my work, it was hour work!"
Hour Work
Explanation
Explain Bear
Listen up, buttercup. The joke is that "our" is being replaced with "hour" in the phrase "our work". Someone is trying to be slick and use a play on words. You probably think a quarterback is only a fourth of a dollar.