# Music Theory for the 21st-Century Classroom

3 Hacker News commenters recommended Music Theory for the 21st-Century Classroom and 5 criticized it, November 2025 to November 2026. It was recommended in 1 of 13 months.

**Verdict:** Recommended as a complete, openly licensed full-year music theory textbook with assignments that suits self-study. Critics find the explanations weak and the focus heavily classical.

## Why people recommend it

- Complete full-year college course (2 comments): "it’s a full year college music theory textbook with an open license" ([source](https://news.ycombinator.com/item?id=49653845)) "A very complete and great resource from the looks of it IMO." ([source](https://news.ycombinator.com/item?id=49670130))
- Assignments support self-study (1 comments): "takes you to the homeworks/assignments and everything else for a self-study/auto-didact to follow along" ([source](https://news.ycombinator.com/item?id=49647972))
- Openly licensed textbook (1 comments): "it’s a full year college music theory textbook with an open license" ([source](https://news.ycombinator.com/item?id=49653845))

## What people warn about

- Weak explanation of theory (2 comments): "a depressing aversion to explaining why and not only what seems apparent" ([source](https://news.ycombinator.com/item?id=49659981)) "The exposition of the actual theory is pretty bad, though" ([source](https://news.ycombinator.com/item?id=49659263))

## Alternatives hackers recommend

- [Computer Music Tutorial by Curtis Roads](https://hackerapproved.com/p/computer-music-tutorial.md): 5 recommend
- [Introduction to Computer Music by Nick Collins](https://hackerapproved.com/p/introduction-to-computer-music.md): 5 recommend
- [Tuning, Timbre, Spectrum, Scale by William Sethares](https://hackerapproved.com/p/tuning-timbre-spectrum-scale.md): 3 recommend

## Where to get it

- [See price on Amazon](https://www.amazon.com/s?k=Music+Theory+for+the+21st-Century+Classroom&tag=hackerapprove-20) (affiliate link)

## Cite as

Hacker Approved, "Music Theory for the 21st-Century Classroom", https://hackerapproved.com/p/music-theory-for-the-21st-century-classroom/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).