David Ostrowski

Mathematics professor with a passion for making complex concepts accessible. PhD in Applied Math from MIT, specializing in statistics and linear algebra.

2 posts

Mathematics

The Calculus Fundamentals Guide I Wish Someone Had Given Me

Most people don't fail calculus — they fail the algebra that came before it. This guide cuts through the noise with the best courses, free resources, YouTube channels, and books for learning calculus fundamentals at every level.

David Ostrowski

March 27, 2026

16 min

#calculus#calculus-fundamentals#derivatives

Mathematics

The Mathematics Fundamentals Roadmap (Free + Paid Resources)

Mathematics fundamentals are the invisible floor beneath every advanced topic — and most learners skip them. This is a complete roadmap with courses, free platforms, YouTube channels, and communities.

David Ostrowski

March 10, 2026

14 min

#algebra#free-math-resources#geometry