The Bad Great!

I dreamed that I was in my classrom with my others friends and then, the Chemistry Teacher, João Lins, gave the test to us and the greats weren't good, including the mine. But many students didn't do a good Chemistry Test, It was so difficult! In my dream too, the teacher sad to me: "Sérgio, you have to study more to Chemistry, you didn't matter to this Test, you didn'r study Chemistry, study more!!" And really, I have to study more Chemistry, but in the others test I didn't study and got good greats, but in this new Test, I study a little and didn't do a good test