OK but why chalk : r/math

Why are math professors so fond of chalks? - Quora

Back To School Background with Title Back To School and Formulas Written by Chalk on the Chalkboard Stock Photo - Image of black, wooden: 73025670

Why do mathematicians love blackboards so much? : r/math

Different drawn geometric figures and math formulas on green chalkboard Stock Photo - Alamy

CSUN Receives $2.3 Million Grant For Math Program

Premium Photo Writing math from chalk on background scientific formulas and calculations in physics and mathematics.

math formulas on black board Stock Photo - Alamy

FLFK 3D Math Science Formulas Chalkboard Self-Adhesive Wallpaper Peel and Stick Physics Wall Murals Large Poster for Bedroom Living Room Decor 141.7x 98.4

Some thoughts about why American math education stinks - The Critical Reader

Eistein Equation in chalkboard - science, Stock Video

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Math Formulas Written In White Chalk And Copy Space On Black Board Photo Background And Picture For Free Download - Pngtree

Page 2 Math Chalk Images - Free Download on Freepik

This is was on my friends chalkboard when they moved in.Anyone got any ideas what it refers to, if it makes any sense or what it's calculating? : r /Physics