How overhead projectors took over your classroom

Title: How overhead projectors took over your classroom

标题：高射投影仪是如何占领你的教室的

PodcastsGadgetsTechHow overhead projectors took over your classroomOn Version History: How a bit of military tech changed the way we learn forever.On Version History: How a bit of military tech changed the way we learn forever.by David PierceOct 18, 2026, 12:55 PM UTCDavid Pierce is editor-at-large and Vergecast co-host with over a decade of experience covering consumer tech. Previously, at Protocol, The Wall Street Journal, and Wired.

播客、小工具、科技：高射投影仪是如何占领你的教室的。在《版本历史》中：一项军事技术如何永远改变了我们的学习方式。作者：David Pierce，2026年10月18日，世界标准时间下午12:55。David Pierce是《Vergecast》的特约编辑和联合主持人，在消费科技报道领域拥有超过十年的经验。此前曾供职于《Protocol》、《华尔街日报》和《连线》。

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! But then came a bit of technology, previously mostly used for military purposes, called the overhead projector. It would change far more than just the disciplinary record of students everywhere.

过去在学校里做小动作总是很容易。毕竟，老师总是背对着学生在黑板上写字！但随后出现了一项此前主要用于军事目的的技术，即高射投影仪。它所改变的远不止是各地学生的纪律记录。

In this episode of Version History, we tell the story of the overhead projector. David Pierce is joined by The Verge’s Jake Kastrenakes and Stanford professor Antero Garcia to discuss how overhead projectors were developed, how they made their way into classrooms, and how they changed so much about the way kids learn. They also try to figure out why overhead projectors have mostly gone away, and whether the things that replaced them — from PowerPoint presentations to computer screens to those new-fangled smart boards — actually improved on the OHP.

在本期《版本历史》中，我们讲述了高射投影仪的故事。David Pierce与The Verge的Jake Kastrenakes以及斯坦福大学教授Antero Garcia一起，讨论了高射投影仪是如何被开发出来的，它们是如何进入教室的，以及它们在多大程度上改变了孩子们的学习方式。他们还试图找出高射投影仪为何大多已销声匿迹，以及取代它们的事物——从PowerPoint演示文稿到电脑屏幕，再到那些新颖的智能白板——是否真的比高射投影仪有所改进。

This is the final episode of the fifth season of Version History, all about the most iconic school tech. Thanks so much for watching, listening, sending feedback, and everything else! Other than the OHP, we also spent this season looking at Oregon Trail, the original Chromebook, the One Laptop Per Child program, the LeapFrog LeapPad, and those ubiquitous Texas Instruments calculators. If you missed any part of our season, check out the episodes here:

这是《版本历史》第五季的最后一集，主题是关于最具标志性的学校科技。非常感谢大家的观看、收听、反馈以及其他一切支持！除了高射投影仪，本季我们还探讨了《俄勒冈之旅》、最初的Chromebook、一个孩子一台笔记本电脑计划、LeapFrog LeapPad以及那些无处不在的德州仪器计算器。如果你错过了本季的任何内容，请点击此处查看剧集：

The Version History podcast feedThe Version History YouTube channelOur TikTok and Instagram accountsIf you’re a Verge subscriber, you can also get access to Version History (and all our other podcasts) with no ads. All you have to do is visit your account settings.

《版本历史》播客订阅源、《版本历史》YouTube频道、我们的TikTok和Instagram账号。如果你是The Verge的订阅用户，你还可以免广告收听《版本历史》（以及我们所有的其他播客）。你只需访问你的账户设置即可。

If you want to know more about the overhead projector, here are some links to get you started:A brief history of the Magic Lantern3M’s century of innovationA delightful OHP adFrom NPR: Sputnik Left Legacy for U.S. Science EducationFollow topics and authors from this story to see more like this in your personalized homepage feed and to receive email updates.

如果你想了解更多关于高射投影仪的信息，以下是一些入门链接：幻灯机的简史、3M的百年创新、一则有趣的高射投影仪广告、来自NPR的报道：斯普特尼克号为美国科学教育留下的遗产。关注本报道的主题和作者，以便在你的个性化主页订阅源中查看更多类似内容并接收电子邮件更新。

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