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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•12mo ago

Comments

trane_project•12mo 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/

Speedcubing extension for Pi coding agent

https://github.com/totimorpa/pi-cubing
1•totimorpa•1m ago•1 comments

We made EU CRA Article 14 compliance free (cvdportal.com)

https://cvdportal.com/blog/why-we-built-cvd-portal
1•Ceravi•4m ago•0 comments

S. "Soma" Somasegar, 1966-2026

https://www.geekwire.com/2026/s-soma-somasegar-1966-2026-microsoft-and-madrona-leader-was-a-champ...
1•lukebennett•5m ago•0 comments

Is this an worse moment for a math career?

https://mathoverflow.net/questions/511484/is-this-an-even-worse-moment-for-a-math-career
1•bananaflag•8m ago•0 comments

The Fall of the Theorem Economy

https://davidbessis.substack.com/p/the-fall-of-the-theorem-economy
2•tmp10423288442•10m ago•1 comments

When AI can write your code, do you still need a CMS?

https://www.bitsandletters.com/ideas/do-you-still-need-a-cms-with-ai
1•demaree•10m ago•0 comments

Pica 10.0 has been released, delivering the first major modernization update

https://github.com/nodeca/pica
1•javatuts•11m ago•0 comments

Mind-Blowing Growth Is About to Propel Anthropic into First Profitable Quarter

https://www.wsj.com/tech/ai/mind-blowing-growth-is-about-to-propel-anthropic-into-its-first-profi...
6•sigmar•12m ago•1 comments

Temporal Primer – Building Long-Running Systems

https://arpitbhayani.me/blogs/temporal-primer/
1•Samarrrtthh•12m ago•0 comments

Prompt Injection in a Brazilian Courtroom: When the Attack Left the Lab

https://www.pentesty.co/blog/prompt-injection-brazil-labor-court-2026
1•davikr•14m ago•0 comments

Trump Sued Himself and Walked Away with a $100M Tax Debt Erased

https://www.techdirt.com/2026/05/20/trump-sued-himself-and-walked-away-with-a-100-million-tax-deb...
5•latexr•16m ago•0 comments

Congress Banned a Gun Registry. AI Doesn't Need One

https://medium.com/statute-circuit/congress-banned-a-gun-registry-ai-doesnt-need-one-8c1beb9e7374
3•delschlangen•17m ago•1 comments

How to Set Up a Remote MCP Server for Your SaaS

https://docsalot.dev/blog/how-to-set-up-a-remote-mcp-server-for-your-saas
3•fazkan•18m ago•0 comments

Show HN: Git-based front-end interface for Hugo

https://github.com/arashthr/hugo-flow
2•arashThr•18m ago•0 comments

SK Hynix flooded with offers from Big Tech to secure memory chips

https://www.reuters.com/world/asia-pacific/sk-hynix-flooded-with-unprecedented-offers-big-tech-fi...
2•p_stuart82•19m ago•0 comments

Researchers Design and Build First Artificial Protein (2003)

https://www.hhmi.org/news/researchers-design-and-build-first-artificial-protein
2•noleary•20m ago•0 comments

Nvidia commits $90B to AI deals

https://www.semafor.com/article/05/20/2026/nvidia-commits-90-billion-to-ai-deals
4•logickkk1•21m ago•0 comments

Sam Altman makes 'mic drop' offer to every Y Combinator startup

https://techcrunch.com/2026/05/20/sam-altman-makes-mic-drop-offer-to-every-y-combinator-startup/
3•evo_9•22m ago•1 comments

Starting June 1 Copilot code review runs will consume minutes on GitHub

https://docs.github.com/en/copilot/reference/copilot-billing/models-and-pricing
2•rcy•23m ago•0 comments

Show HN: Visual Studio for Cloud

https://github.com/light-cloud-com/ice
2•julia-kafarska•24m ago•0 comments

Samsung vs. MPEG LA appeals arguments [video]

https://www.youtube.com/watch?v=ixVEsTbt9LU
1•tehwebguy•25m ago•1 comments

The hermeneutic circle: a key to critical reading

https://nesslabs.com/hermeneutic-circle
1•andsoitis•30m ago•0 comments

Cloudflare CEO on how he chooses which employees to replace with AI

https://www.wsj.com/opinion/how-i-choose-which-cloudflare-employees-to-replace-with-ai-40a197e5
5•oradwan•30m ago•0 comments

A beginner-friendly approach to Pratt Parsing

https://washingtonramos.com/posts/1
2•PotatoFarmsKing•30m ago•1 comments

LocalFlow, run and protect n8n from laptop to cloud

https://github.com/karimbaidar/n8n-localflow
2•baidarkarim•31m ago•0 comments

NTSB Animation for UPS flight 2976 [video]

https://www.youtube.com/watch?v=iWkLZjJXaos
2•yupmat•32m ago•0 comments

Starship's Twelfth Flight Test

https://www.spacex.com/launches/starship-flight-12
24•pantalaimon•34m ago•11 comments

PostgreSQL backup tool gets some backup of its own after maintainer sounds alarm

https://www.theregister.com/databases/2026/05/20/postgresql-backup-tool-gets-some-backup-of-its-o...
2•Bender•35m ago•1 comments

Adding Foreground Tab Tracking to the Chrome Devtools Protocol

https://www.browserbase.com/blog/cdp-foreground-tab-tracking
2•nikisweeting•36m ago•1 comments

Bye-bye, Gemini CLI; Google's gone and swapped you for a closed-source AI

https://www.theregister.com/ai-ml/2026/05/20/bye-bye-gemini-cli-google-nudges-devs-toward-antigra...
1•Bender•36m ago•0 comments