I don't agree with this article, it as off-putting as the usual math eduacation it criticizes. I wonder how one can propose a curriculum to study math and not mention Euclid. One learns more mathematics from this article https://mathshistory.st-andrews.ac.uk/Extras/Russell_Euclid/ by B. Russell where he harshly criticizes Euclid than 2 years of calculus. Newton did not know calculus but he knew Euclid's Book 5, the book about ratios and proportions. Euclid's 5th Book must be the starting point for the study of math. When we say "math is the language of nature" we really mean that nature is proportional. Ratios and proportions are fundamental.