In Biology, my teacher was going through Chemistry revision (coz she can teach Chem better than our actual Chem teacher) and she started teaching one part which I was already alright with. So I doodled.

1st: my pen
2nd: the stuffed owl in a box on top of my teacher's cupboard
3rd: the back of my teacher's head
4th: pencil shavings

Ignore the blue box 😂