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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/

Writing clear docs when you naturally think in code

https://www.knowledgeowl.com/blog/posts/writing-docs-when-you-think-in-code
1•eigenBasis•33s ago•0 comments

Cavity quantum electrodynamics control of quantum Hall stripes

https://www.nature.com/articles/s41567-026-03287-3
1•bookofjoe•4m ago•0 comments

US Justice Department 'forever' bars IRS from auditing Trump's past tax returns

https://www.theguardian.com/us-news/2026/may/19/trump-irs-settlement-tax-returns
4•embedding-shape•9m ago•1 comments

Poor grip strength linked to greater odds of developing depression

https://medicalxpress.com/news/2026-05-early-poor-strength-linked-greater.html
1•Gaishan•12m ago•0 comments

Stop paying $360/year to access your own email history

https://mailvaulty.com
1•khaledsabae•13m ago•1 comments

LLMs Are Revealing How Low the Bar Is (and Lowering It Even Further)

https://countercraft.substack.com/p/llms-are-revealing-how-low-the-bar
3•crescit_eundo•16m ago•0 comments

State Space Models, Explained Through Code

https://karthik-ragunath-ananda-kumar-blogs.notion.site/State-Space-Models-Explained-Through-Code...
1•eigenBasis•17m ago•0 comments

StartupStarter – we built a company brain so AI can do your work

https://startupstarter.co/
1•SCJB•21m ago•3 comments

Google Cloud has blocked our account, making some Railway services unavailable

https://twitter.com/i/status/2056883076496789854
4•bundie•24m ago•3 comments

An AI Co-Scientist for Hypothesis Generation from Google DeepMind

https://doi.org/10.1038/s41586-026-10644-y
2•car•24m ago•0 comments

Windows on Nintendo 64

https://www.youtube.com/watch?v=eGS9su_inBY
2•cedel2k1•27m ago•0 comments

Everything You Do Is Being Recorded

https://www.theatlantic.com/technology/2026/05/ai-wearable-surveillance-countermeasures/687203/
2•breve•28m ago•1 comments

Railway Blocked by Google Cloud

https://status.railway.com/?date=20260519
16•aarondf•40m ago•3 comments

Google's First AI Smart Glasses Launching This Fall with iPhone Support

https://www.macrumors.com/2026/05/19/google-ai-smart-glasses-iphone-support/
1•mikhael•42m ago•0 comments

I made an App that uses local LLMs to monitor your screen

1•roy3838•43m ago•0 comments

Show HN: The user agents crawling HN today

https://ai.realhackers.org/user_agents.txt
1•Bender•45m ago•1 comments

Show HN: Export Webflow sites and CMS content

https://www.webflowexport.com/
2•happyyeti•46m ago•1 comments

Generative art collection based on human interpretation

https://www.mixedmessages.fyi/auction
1•knownquantity_•47m ago•2 comments

WhatsApp Web Became Facebook

https://old.reddit.com/r/whatsapp/comments/1ti3qxf/whatsapp_web_became_facebook/
3•Crier1002•54m ago•0 comments

Railway Currently Down

https://twitter.com/Railway/status/2056873075401007338
5•kristianc•55m ago•1 comments

El Niño is coming. The last time ocean temp. looked like this, millions died

https://respublicamgz.substack.com/p/a-super-el-nino-is-coming-the-last
19•ResPublica•58m ago•2 comments

50-year WHO/CDC Ebola outbreak pipeline in a weekend

https://github.com/vrsabha/outbreak-tracker
1•hn_career•1h ago•1 comments

Tell HN: Google banned Railway's account. Everything down

7•sergiotapia•1h ago•4 comments

GitHub is investigating unauthorized access to their internal repositories

https://twitter.com/github/status/2056884788179726685
57•splenditer•1h ago•13 comments

N display of stupid, secret CISA credentials found in public GitHub rep

https://arstechnica.com/information-technology/2026/05/in-stunning-display-of-stupid-secret-cisa-...
2•sbulaev•1h ago•1 comments

Google Cloud suspends Railway account causing major outage

https://twitter.com/Railway/status/2056883076496789854
6•sincinnatusc•1h ago•0 comments

Age Shapes the Adoption of New Technologies

https://insight.kellogg.northwestern.edu/article/swipe-or-tap-how-age-shapes-the-adoption-of-new-...
1•PopAlongKid•1h ago•1 comments

Google's AI Studio now lets anyone build Android apps in minutes

https://techcrunch.com/2026/05/19/googles-ai-studio-now-lets-anyone-build-android-apps-in-minutes/
3•cpncrunch•1h ago•1 comments

Heads, Trump Wins ( Tails, he still wins)

https://www.theatlantic.com/newsletters/2026/05/trump-corruption-irs-fund/687227/
2•KnuthIsGod•1h ago•0 comments

My Arduino spins faster when Claude burns more tokens

https://terminalbytes.com/arduino-claude-code-activity-meter/
2•mtlynch•1h ago•1 comments