teechrAbout
Lectures end. The ideas shouldn't.
teechr turns a lecturer's slides into a narrated video of two or three minutes, for students to watch before class, after it, and before the exam — so what a course is built on is still there when they need it.
Why teechr
Not a summary. A selection.
A three-hour lecture comes to something like 27,000 spoken words. A two-minute video has room for about 300. Shrink every slide to fit, and what's left is a fragment of everything and the sense of nothing.
So teechr doesn't summarise. It picks the handful of named ideas your course stands on, explains each one plainly, draws how it's built, and credits it the way your slides do. The rest stays in your lecture, where it belongs.
27,000 words in a three-hour lecture
300 words in a two-minute video
What we hold to
Six rules every video follows.
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Only what's in your course
teechr works from the course you upload, and checks every name and citation against it.
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You have the last word
Nothing is voiced until you've read the script. Change any line, as often as you like.
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Named and credited
Each key idea keeps the name the exam uses, credited the way your deck credits it.
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Said, not printed
The narrator explains while the screen draws the idea. Printing the sentence being spoken as well makes people learn less.
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Ends on a question
The video stops until students answer. Recalling an idea fixes it better than reading it again.
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Private by default
Every video has its own unlisted link, kept out of search engines. Students need no account and no app.
The research
Built on what's known about memory.
Each part of a teechr video answers a finding about how people learn and where their attention goes. These are the studies behind them.
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Ebbinghaus, 1885
Forgetting starts at once
In the first study of forgetting, memory for newly learned material fell steeply within a day, then levelled off.
So a video is worth watching after the lecture, not only before it.
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Cepeda et al., 2006
Spread out beats all at once
Across hundreds of comparisons, study spread over separate sessions left more remembered than the same study in one go.
So one video is worth sending before class, after it, and before the exam.
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Roediger & Karpicke, 2006
Recalling beats rereading
Rereading does better on a test five minutes later. Two days or a week later, students who were tested instead remember more.
So every video ends on a question students have to answer.
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Mayer, 2009
Say it, don't print it
People learn more from a narrated diagram than from the same diagram with the narration printed on screen as well.
So the screen shows an idea's name and shape, never the sentence being spoken.
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Sung & Mayer, 2012
Decoration isn't explanation
Pictures that only decorate a lesson make it more liked, but not better learned.
So each scene draws how its idea is built: a comparison, a sequence, a set of kinds.
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Guo, Kim & Rubin, 2014
Attention runs short
Across 6.9 million video sessions on edX, the typical viewer stopped by about six minutes, however long the video.
So a teechr video takes two or three minutes.
Who we are
Made by KERAPPS, a French company.
You keep every right to the courses you upload and to the videos made from them. The site and your videos are hosted on Cloudflare, and the services that write and voice a video are named in the privacy policy.
Write to us
Questions, ideas, or a video that didn't come out the way you hoped.
Company details are in the legal notice, and how your data is handled is in the privacy policy.
See what teechr makes of your course.
Your first lesson is free. Upload a .pptx or .pdf — you'll read the script before anything is voiced.