Hi! I'm David, a math and physics teacher from Medellín, Colombia. I've spent years in classrooms watching students roll their eyes at algebra and then light up when a joke finally makes it click. The Empty Set is where those jokes live: clean, funny designs for math teachers, science nerds, calculus survivors and anyone who has ever been told to show their work. Every design is made by a real teacher, so the math is always right (90°). Wear the proof.

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