I wrote a book that is exactly what you describe (high school math review for adults), which you can check here: https://www.amazon.com/dp/099200103X/noBSmath (~200 pages = compact review of high school math topics with lots of exercises and practice problems)

The green book is a subset of the longer book that also covers mechanics and calculus https://www.amazon.com/dp/0992001005/noBSmathMechCalc (see preview here https://minireference.com/static/excerpts/noBSguide_v5_previ... )

High school math is very deep, so I will not claim to cover all topics, but I present the most useful parts (equations, algebra, functions and inverses, math modelling), so it would be a good starting point.

Independent and in addition to the above, you can check out this printable tutorial on SymPy that can also be helpful as a review of lots of high school math material: https://minireference.com/static/tutorials/sympy_tutorial.pd...

Could have been us — we have a "free PDF if you email me proof of purchase for print" policy for all our books[1,2,3]. Currently, I handle this manually via email, but I wish this was more automated somehow (e.g. shopping cart plugged into print-on-demand fulfillment API + digital delivery of eBook in all formats).

[1] https://www.amazon.com/dp/0992001005/noBSmathphys (high school math review, mechanics, and calculus) [2] https://www.amazon.com/dp/0992001021/noBSLA (linear algebra) [3] https://www.amazon.com/dp/099200103X/noBSmath (high school math review)