UC-Berkeley math prof says she has to teach fractions to calculus students because standards have fallen so far

 https://nypost.com/2026/08/16/us-news/uc-berkeley-math-prof-forced-to-teach-fractions-because-standards-have-fallen-so-far

That's why the precollege years of study are very important for building upon each other. If one misses certain things along the way, it can really hider them later on.  

https://dictionary.cambridge.org/dictionary/english/great-minds-think-alike

https://www.britannica.com/science/mathematics/Newton-and-Leibniz

https://www.oxfordscholastica.com/blog/technology-articles/newton-and-leibniz-the-fathers-of-calculus/

https://en.wikipedia.org/wiki/History_of_calculus#Newton_and_Leibniz 

https://medium.com/@izaakmaine/the-calculus-wars-e7ac64fa006a

https://www.ebsco.com/research-starters/history/development-calculus Authored By: Paradowski, Robert J., PhD

https://en.wikipedia.org/wiki/Leibniz%E2%80%93Newton_calculus_controversy#Background 

https://vplevris.medium.com/newton-vs-leibniz-the-calculus-war-that-changed-europe-1b35fde2bb9f

https://en.wikipedia.org/wiki/Leibniz%E2%80%93Newton_calculus_controversy#Leibniz's_death_and_end_of_dispute

https://en.wikipedia.org/wiki/Calculus_of_variations 

https://www.quora.com/Newton-and-Leibniz-discovered-calculus-around-the-same-time-What-are-other-examples-of-simultaneous-and-independent-discoveries 

https://mindmatters.ai/2023/07/is-mathematics-discovered-or-invented/  

https://sethlewis.ie/2019/10/22/do-great-minds-really-think-alike

https://www.phrases.org.uk/meanings/great-minds-think-alike.html