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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

1•itamarst•29s ago

The Old Recession Playbook Is Wrong. Stop Cutting People First

https://boringops.sh/articles/the_old_recession_playbook_is_wrong/
1•speckx•1m ago•0 comments

Getting multiple GitHub accounts on one Windows machine – 2026 update

https://joshcgrossman.com/2026/03/29/getting-multiple-github-accounts-on-one-windows-machine-2026...
1•speckx•2m ago•0 comments

Commits on Nights and Weekends

https://robertsahlin.substack.com/p/2000-commits-on-nights-and-weekends
1•duck•2m ago•0 comments

Artemis II

https://en.wikipedia.org/wiki/Artemis_II
1•js2•2m ago•0 comments

The Rise of AI Augmented Writing

http://lockboxx.blogspot.com/2026/04/on-rise-of-ai-augmented-writing.html
1•ahokk•2m ago•0 comments

Ask HN: Is anyone using the paid app of screenpi.pe

1•mescalito•3m ago•0 comments

Dutchman labs – better evals for your AI agent

https://dutchmanlabs.com/
1•thesarsour•4m ago•1 comments

Quantum physics can confirm where someone is located

https://www.sciencenews.org/article/quantum-physics-location-security
1•kolanos•4m ago•0 comments

Movie Review: The AI Doc (2026)

https://thezvi.substack.com/p/movie-review-the-ai-doc
3•icely•5m ago•0 comments

Yupp.ai Is Closing

https://blog.yupp.ai/winddown
2•mkaramuk•6m ago•0 comments

LinkedIn MCP Server

https://github.com/stickerdaniel/linkedin-mcp-server
2•wslh•6m ago•0 comments

Show HN: Real-time dashboard for Claude Code agent teams

https://github.com/simple10/agents-observe
2•simple10•6m ago•1 comments

Translating non-trivial codebases with Claude

https://blog.danieljanus.pl/2026/03/26/claude-nlp/
1•nathell•7m ago•0 comments

Orthogonal to Eternity

https://www.metanoia-research.com/dispatch-002-orthogonal-to-eternity/
1•metanoia_•8m ago•0 comments

The Profession That Does Not Exist

https://thebaffler.com/odds-and-ends/the-profession-that-does-not-exist-symposium
1•greenie_beans•9m ago•0 comments

FFII Gifts Macron's EU Law Glasses to Unified Patent Court Judges

https://ffii.org/ffii-gifts-macrons-reading-glasses-to-unified-patent-court-judges/
2•zoobab•11m ago•0 comments

Trump suggests in new interviews he is considering withdrawing from NATO

https://www.cnn.com/2026/04/01/middleeast/trump-nato-us-withdrawal-intl
2•rawgabbit•11m ago•0 comments

CUDA Released in Basic

https://developer.nvidia.com/blog/cuda-tile-programming-now-available-for-basic/
3•apples2apples•11m ago•1 comments

GLM-5.1 tops Vector DB Benchmark

https://vector-db-bench.kcores.com/en/#leaderboard
3•Alifatisk•11m ago•0 comments

StepFun 3.5 Flash is #1 cost-effective model for OpenClaw tasks (300 battles)

https://app.uniclaw.ai/arena?tab=costEffectiveness&via=hn
7•skysniper•13m ago•1 comments

Mars for the Rest of Us

https://mceglowski.substack.com/
3•simonebrunozzi•14m ago•0 comments

Chrome Extensions Turn Shady

https://timleland.com/chrome-extensions-turn-shady/
2•TimLeland•15m ago•0 comments

EmDash: A spiritual successor to WordPress and plugin security

https://blog.cloudflare.com/emdash-wordpress/
19•elithrar•16m ago•4 comments

Predatorgate: Breaking the chain of impunity of the spyware underworld

https://edri.org/our-work/predatorgate-breaking-the-chain-of-impunity-of-the-spyware-underworld/
2•jruohonen•18m ago•0 comments

Musk's SpaceX Files to Go Public in One of the Biggest IPOs

https://www.wsj.com/business/spacex-ipo-sec-paperwork-filed-997e45e4
2•simonebrunozzi•18m ago•1 comments

Show HN: Morse Command – asteroid shooter that teaches Morse code (iOS)

https://morsecommand.com/
2•damascus•18m ago•0 comments

Show HN: Composable CLI for your meeting workflow

https://cli.char.com/
2•yujonglee•20m ago•0 comments

AI CEO vs. Engineer

https://www.youtube.com/watch?v=WAUnmQt2Z7Y
3•quantummagic•21m ago•1 comments

WIRED Talks About DIY Mobile Phones in 2006

https://www.wired.com/2006/12/diy-cell-phone/
2•OhMeadhbh•21m ago•1 comments