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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo ago
> Nonetheless, Bloom was on to something: Tutoring and mastery learning do have a degree of experimental support, and fortunately it seems that carefully designed software systems can completely replace the instructional side of traditional teaching, achieving better results, on par with one to one tutoring. However, designing them is a hard endeavour, and there is a motivational component of teachers that may not be as easily replicable purely by software.

I've been working on an implementation of mastery learning and other related techniques called Trane (https://github.com/trane-project/trane/) for the past three years or so. Mastery learning is the main one, but it also integrates spaced repetition, interleaving, mixing difficulties, and reward propagation (doing well or bad in an exercise affects how related exercises are scheduled).

I think it works pretty well, but you need to pair it with proper pedagogy of the skill you want to learn and the proper curriculum. The latter is the hardest part, so it's being my main limitation. I've used some external resources to build courses, and they work well, but obviously it would work much better with a full curriculum built from the ground up.

Currently working on Pictures Are For Babies (https://picturesareforbabies.com/), which is meant to do just that for literacy. I am hoping to do a first release soon. As for the motivation angle, the solution in this particular instance is fairly simple. Use the software to enforce scheduling andpedagogy,y and a human tutor to provide emotional and social support. This division allows any literate person to become an effective tutor with a few hours of training.

I am hoping that the average student can complete the whole curriculum in five years. That would mean that (assuming they start at between 4 and 5 years old), the average student would have college-level reading and writing skills by the time they are nine or ten.

Most complete explanation so far is in the pedagogy page: https://picturesareforbabies.com/home/pedagogy/

Claude's Corner

https://substack.com/home/post/p-189177838
1•YeGoblynQueenne•9m ago•0 comments

AI pays for its self-existence

https://web4.ai/
1•johntopia•14m ago•1 comments

NASA spots new signs of lightning on Mars

https://www.scientificamerican.com/article/is-there-lightning-on-mars-new-evidence-suggests-its-t...
1•Brajeshwar•15m ago•0 comments

Obsidian Sync now has a headless client

https://help.obsidian.md/sync/headless
7•adilmoujahid•16m ago•0 comments

Anthropic vs. DoD: "Any lawful use" is a fight about control

1•colek42•17m ago•1 comments

Yarn 6 has been implemented in Rust

https://yarn6.netlify.app/blog/2026-01-28-yarn-6-preview/
1•porada•19m ago•0 comments

Show HN: Stacked Game of Life

https://stacked-game-of-life.koenvangilst.nl/
1•vnglst•19m ago•0 comments

The Epstein Tax

https://www.profgalloway.com/the-epstein-tax/
1•simonebrunozzi•19m ago•0 comments

Giant string of organic molecules on Mars may be one of best signs of life yet

https://www.livescience.com/space/mars/giant-string-of-organic-molecules-on-mars-may-be-one-of-th...
3•Brajeshwar•21m ago•0 comments

The Saga of Kowloon Walled City

https://www.atlasobscura.com/articles/kowloon-walled-city
3•Brajeshwar•25m ago•0 comments

Unfreeze for ChatGPT – Fix freezing on long conversations /30KB Chrome extension

https://inem.gumroad.com/l/unfreeze-for-chatgpt
1•inem•25m ago•1 comments

I caught an Illegal Russian Spy [video]

https://www.youtube.com/watch?v=xjo0iLssbI8
1•dralley•25m ago•0 comments

Why consumer choice is stripped away and how the tech industry profits from it

https://fireborn.mataroa.blog/blog/because-fuck-you-why-consumer-choice-is-being-stripped-away-an...
3•zdw•28m ago•0 comments

Polyworld

https://en.wikipedia.org/wiki/Polyworld
2•nicoloren•31m ago•0 comments

Clustering Developers by Repo/PR/Issue Signals

https://mates.symploke.dev?hn-ph
1•thomasfromcdnjs•32m ago•0 comments

Show HN: Spectra – Turn bank CSV/PDF exports into a local finance dashboard

https://github.com/francescogabrieli/Spectra
1•francesco_gab•33m ago•1 comments

Show HN: Fava Trails – Git-backed memory for AI agents using Jujutsu (JJ)

https://github.com/MachineWisdomAI/fava-trails
1•timeleft--•35m ago•0 comments

Show HN: SQLite for Rivet Actors – one database per agent, tenant, or document

https://github.com/rivet-dev/rivet
2•NathanFlurry•36m ago•0 comments

AssistPlant – Plant Care App in Your Calendar. Your Inbox. The Browser

https://assistplant.com/
1•milos-lekovic•38m ago•1 comments

I coded a game to turn the Epstein Files into Mad Libs. It's hilarious

https://www.epstein-isi.net/
3•douchecoded•39m ago•1 comments

Claude and Gemini debate AI consciousness then analyze their debate performances

https://spinchange.github.io/ai-debates/
1•spinchange•41m ago•1 comments

Ask HN: Whats the best friction approach to breaking phone habits

1•artzev_•43m ago•1 comments

Show HN: MailFomo – Drive urgency in emails with live countdown timers

https://mailfomo.com
1•krachev•43m ago•0 comments

Istota is a powerful (non-claw) AI agent that lives in Nextcloud

https://istota.xyz/
2•durakot•44m ago•0 comments

OpenAI Reaches A.I. Agreement with Defense Dept. After Anthropic Clash

https://www.nytimes.com/2026/02/27/technology/openai-agreement-pentagon-ai.html
1•brandonb•44m ago•0 comments

Why rich people live longer

https://www.empirical.health/blog/rich-people-live-longer-hims-superbowl/
1•brandonb•45m ago•0 comments

Build a DuckDB Extension in Rust in 4 Commands

https://redraiment.medium.com/build-a-duckdb-extension-in-rust-in-4-commands-64600f7e8cc0
1•redraiment•45m ago•1 comments

Agents of Chaos

https://arxiv.org/abs/2602.20021
1•ukuina•45m ago•1 comments

run0 (sudo replacement)

https://www.freedesktop.org/software/systemd/man/257/run0.html
1•bpierre•45m ago•0 comments

You Shouldn't Exercise to Lose Weight

https://time.com/6138809/should-you-exercise-to-lose-weight/
1•paulpauper•47m ago•1 comments