# How overhead projectors changed school forever

> A military technology that let teachers face the class transformed education and discipline in ways we still live with today.
- Title: How overhead projectors changed school forever · The Verge
- Summary: A military technology that let teachers face the class transformed education and discipline in ways we still live with today. Version History podcast…
- Keywords: overhead projector, classroom technology, education history, version history podcast, david pierce, jake kastrenakes, antero garcia, technology, culture, overhead, projectors, changed
- Source: The Verge — https://theverge.com/podcast/1013473/overhead-projector-version-history
- Author: David Pierce
- Published: 2026-10-18T12:55:01+00:00
- Read time: 1 min
- Topics: overhead projector, classroom technology, education history, version history podcast, david pierce, jake kastrenakes, antero garcia, technology, culture
## The problem with chalkboards
Teachers writing at the chalkboard had their backs to students, making it easy for kids to misbehave without getting caught. This changed everything.

> It used to be so easy to get away with things in school. The teacher, after all, was always turned around writing at the chalkboard!
## Military tech enters the classroom
The overhead projector, originally developed for military purposes, allowed teachers to face their students while displaying material on a screen behind them.
## Version History explores the impact
David Pierce, Jake Kastrenakes and Stanford professor Antero Garcia discuss how overhead projectors were developed, entered classrooms and changed learning itself.
## What replaced the overhead projector
PowerPoint presentations, computer screens and smart boards eventually replaced overhead projectors, but the podcast questions whether these replacements actually improved on the original technology.
## Key takeaway

Version History podcast explores how overhead projectors, originally military tech, revolutionized classrooms by letting teachers face students while presenting material.