Bangkok based ninth grade science teacher and imgur user Squeezymo used to do more than just read and mark his student's work, he'd also finishes their doodles too. It soon became clear to the former science teacher that his students really liked to draw on their test papers, so much so that he established a rule that stated if you draw on your test paper the teacher will add to it too.

This only seemed to encourage the students to draw more which gave Squeezymo even more of a chance to get creative, adding in his own funny doodles to the pencil drawings in his distinct red pen that completely change the original drawings intended meaning. You can see more over on his Tumblr blog Grading Thaime!

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via Imgur