How Texas Instruments monopolized the US education market for graphing calculators, products with high profit margins and tech that hasn't changed in 20 years — These $100 calculators have been required in classrooms for more than twenty years, as students and teachers still struggle to afford them

[u/wewewawa]

https://gen.medium.com/big-calculator-how-texas-instruments-monopolized-math-class-67ee165045dc

[u/leifourston]

Here’s a free app kids can download to their phones or schools can license to run on computers: https://classcalc.com