My son’s revising for exams at the moment. I used to be a teacher. One of the things that I’m trying to get across to him is the importance of ‘spaced repetition’.

This post is interesting because it takes that idea and suggests that the best newsletters are ones that help you understand key concepts by giving examples on a regular basis. The author suggests that, in this way, you can effectively write a book.

AI-generated image created by Midjourney with prompt: "a calendar with different colored dots on turquoise background, in the style of light gray and orange, personal iconography, #vfxfriday, oshare kei, hallyu, flat form --ar 142:75"

Spaced repetition is a learning technique where you embed things into memory by re-studying them on a regular basis – for example, organising flash cards so that each new concept is refreshed after a day, then a week, then a month, then a year. One of the unappreciated functions of many newsletters – to be clear, not this newsletter, but other newsletters – is to function as an ad-hoc spaced repetition system.


One thing I wonder about is which kinds of topics are better served by newsletters, and which are better served by books. Presumably if you’re creating a complex argument that requires the reader to hold in mind various ideas that build together, a book is a better fit than a newsletter.

However, many books I read strike me as having One Big Point and then a long series of examples, and in that case I suspect a newsletter dribbling out the examples might be better for reader retention.


We spend so much time reading that it always makes me sad to think that including a little more repetition would have disproportionate impact on our ability to remember and relate to the information we’ve read. In theory we could be note-taking and flash-carding after reading, but this (frankly) feels more like a chore than a pleasure. At their best, “repetitive” newsletters are one way to achieve the same goal less aversively.

Source: Spaced Repetition Through Newsletters | Atoms vs Bits

Image: Midjourney (see alt text for prompt)