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@hu_logic @QasimRashid Private school teachers tend to get paid *less* than public school teachers. Especially at private Christian schools. No union, no need for certified staff.
bitcoin/crypto mining would have been cooler if it was like SETI@Home or something. calculating prime numbers or protein folding patterns. it's tragic how much electricity was wasted for pretend money.
@rbreich $300 on printer paper and ink alone. Taught science and often spent $50 or so for a single lab. Also several hundred dollars on Teachers Pay Teachers content - textbooks were inaccurate and more than a decade out of date.

In looking for some open math textbook references, I ran across this list that the American Institute of Mathematics (AIM) has curated with open source and open access mathematics textbooks.

https://aimath.org/textbooks/

#Math #Textbooks #OpenSource #OpenAccess #OER #Reference #Mathematics

Open Textbook Initiative | American Inst. of Mathematics