6 panel comic, all panels show a student at a desk and a teacher pointing at a board

Top pair:

1 basic math(s): on the board is the number minus one within a root symbol, both within a red circle with a line through it, implying there is no root to minus one.

2 advanced math(s): on the board is the root of minus one equals i

Middle pair:

3 basic physics: on the board it says “3 states of matter”

4 advanced physics: on the board the it says “3 states of matter” but the 3 is crossed out and replaced with a 4 which is also crossed out and replaced with a 7+

Bottom pair:

5 basic biology: on the board it says: " 2 sexes" above a simple table that shows F and M

6 advanced biology: on the board it say: “sex ≠ gender” above a graph of bimodal distribution where one peak is marked M and the other F. At this point the student reacts: “Nooooooo!!!
My 2 genderinos”