There are countless theories floating around the universe pertaining to what precisely constitutes an A+ teacher. Aristotle argues that “The one exclusive sign of thorough knowledge is the power of teaching,” Einstein claims that “It is the supreme art of the teacher to awaken joy in creative expression and knowledge,” and Justin Trudeau says “I am a teacher. It’s how I define myself. A good teacher isn’t someone who gives the answers out to their kids but is understanding of needs and challenges and gives tools to help other people succeed. That’s the way I see myself, so whatever it is that I will do eventually after politics, it’ll have to do a lot with teaching.”

With all of that being said, there are even more specific characteristics which make certain kinds of teachers worthy of being called “Great”:

#1: This teacher allowed a student to bring her baby to class with her one day when finding a suitable babysitter was impossible—but this isn’t even close to the most praiseworthy aspect of the teacher’s actions. When the student’s baby started to cry uncontrollably in class, not only did the teacher neglect to ask the two of them to leave for a while, but the teacher actually held the baby in arms until he was calm.

#2: Any physics teacher—whenever they’re explaining precisely how to cause an explosion, that is.

#3: Art teachers who sketch while they lecture—or even sketch-out their entire lectures!

#4: Math teachers who are capable of drawing 100% equilateral triangles (freehand).

#5: Any teacher who as always been 100% honest—and kind—to all students.

#6: Any teacher who can miraculously lift the morale of the class (even when absolutely everyone is down in the dumps, for no particular reason whatsoever).

#7: Any teacher who allows pets in the classroom every once in a while (as long as there are no applicable allergies, and as long as appropriate safety precautions are taken and heeded in full).

#8: Astronomy teachers who like watching Discovery Channel Space—and any show featuring Michio Kaku or Neil deGrasse Tyson—just as much as their students do.

#9: Math teachers who enjoy reciting the number for Pi to at least ten decimal places (but only when asked).

#10: Science teachers who usually dress like traditional scientists.

#11: Any teacher who doesn’t assign real or “busy” work on the last day of the course.

#12: Any teacher who has never allowed themselves to be deceived by a student (even if they won’t call a student out if they don’t have to).

#13: Any teacher who genuinely goes with the flow (or the general consensus) of the class.

#14: History teachers who know the dates for everything (but don’t put many dates on exams).

#15: Any teacher ensures that there is a clock in the classroom which every student can see while writing quizzes, tests, or exams.

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