I definitely feel the teacher's power. Especially from such a dynamic angle.
Now I understand you want to show off the teacher's butt, but from this angle you would see a lot less of it especially the left cheek. Also I think you would see less of the boy's upper left arm. His back looks a little... broken.
Pretty clever, coloring by the way. The unsaturated lifeless background really helps the characters stand out. I almost didnt notice that this kid had an F minus. Things like that always make me feel like I just discovered like a little bonus secret.