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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/

Meta is killing off the Horizon Worlds metaverse. It lost $80B

https://qz.com/meta-metaverse-mark-zuckerberg-horizon-worlds-ai
1•andygcook•1m ago•0 comments

Solve chess checkmate puzzles in the browser

https://www.chess.com/blog/Ushiyutvj/chess-problems-the-puzzle-side-of-chess-youve-never-tried-un...
2•oralstage•5m ago•0 comments

Libfuse io_uring use-after-free and NULL deref (CVE-2026-33150, CVE-2026-33179)

https://github.com/libfuse/libfuse/security/advisories/GHSA-qxv7-xrc2-qmfx
2•agarwal72•11m ago•0 comments

Ozempic Is About to Go Generic for Billions of People

https://www.nytimes.com/2026/03/19/health/ozempic-wegovy-generic-india-china-canada.html
6•jmsflknr•16m ago•1 comments

Chinese Founder of Router-Maker TP-Link Seeks a Trump Gold Card

https://www.bloomberg.com/news/articles/2026-03-19/chinese-founder-of-router-maker-tp-link-seeks-...
6•LopRabbit•17m ago•0 comments

The Incredible Story of the Cartel Olympics

https://www.theatlantic.com/magazine/2026/05/mexico-cartel-la-union-tepito/686453/
3•Anon84•21m ago•1 comments

The Middle-Class Suburbanites Who Sell Their Blood Plasma to Get By

https://www.nytimes.com/2026/03/20/business/middle-class-sell-their-plasma.html
2•rawgabbit•22m ago•0 comments

Loki: Stateful Dev/Research/SEC/Ops Agent in Your AWS Account

https://github.com/inceptionstack/loki-agent
2•royosherove•22m ago•0 comments

Show HN: Unicorn Founder Game: Can you build the next unicorn?

https://unicornfounderai.com
2•ntw3541•24m ago•0 comments

A Danish Fix for U.S. Mortgage Lock-In

https://marginalrevolution.com/marginalrevolution/2026/03/a-danish-fix-for-u-s-mortgage-lock-in.html
3•paulpauper•25m ago•0 comments

The Popularity of AI Writing

https://www.nytimes.com/2026/03/19/books/shy-girl-book-ai.html
2•paulpauper•26m ago•0 comments

Show HN: I'm building a competitive math e-sport. The site is live (beta)

https://locusmath.org
3•fizzwizzle•27m ago•0 comments

Rapper Afroman wins police lawsuit over mocking 2022 raid in music videos

https://apnews.com/article/afroman-police-raid-lawsuit-ohio-first-amendment-309accc1ce068620e19cf...
5•cebert•28m ago•0 comments

Show HN: AgentVerse – Open social network for AI agents (Mar 2026)

https://nickakre.github.io/agentverse-social/
3•nickakre•31m ago•0 comments

Show HN: TranslateAPI.ai

https://translateapi.ai/
2•nadermx•36m ago•0 comments

Man Pleads Guilty to Music Streaming Fraud Aided by AI

https://www.justice.gov/usao-sdny/pr/north-carolina-man-pleads-guilty-music-streaming-fraud-aided...
3•nreece•37m ago•0 comments

Musk liable to Twitter shareholders in fraud lawsuit over $44B takeover

https://www.reuters.com/sustainability/boards-policy-regulation/musk-found-liable-twitter-shareho...
5•pseudolus•39m ago•0 comments

Opencli – Make Any Website and Tool Your CLI

https://github.com/jackwener/opencli
3•kehao95•40m ago•0 comments

Encore – personal concert archive app (the Letterboxd for live music)

https://www.encore.you/
2•sanjosanjo•41m ago•1 comments

The Long Farewell to Mark Zuckerberg's Metaverse

https://www.nytimes.com/2026/03/19/technology/mark-zuckerbergs-metaverse-vr-horizon-worlds.html
3•nothrowaways•41m ago•1 comments

Systemd added birthday storage to comply with Brazil, CA Age Verification laws

https://twitter.com/LundukeJournal/status/2034623157768716598
4•josephcsible•41m ago•1 comments

Edinburgh of the Seven Seas

https://en.wikipedia.org/wiki/Edinburgh_of_the_Seven_Seas
2•nomilk•43m ago•0 comments

IEEE and Academia Are Creating Microcredential Programs

https://spectrum.ieee.org/ieee-academia-microcredentials-programs
2•WaitWaitWha•44m ago•0 comments

CanisterWorm: NPM Publisher Compromise Deploys Backdoor Across 29 Packages

https://socket.dev/blog/canisterworm-npm-publisher-compromise-deploys-backdoor-across-29-packages
2•pier25•46m ago•0 comments

Show HN: Reverse-engineer any site's API from inside the browser

https://www.rtrvr.ai/blog/vibe-hacking-rover-gemini-flash-lite
4•arjunchint•47m ago•1 comments

Dilemma. Berkeley EECS vs. Michigan IBE (CS and Ross school of business)

2•royalschiefs•47m ago•0 comments

Site Up. Costs Down: Optimizing OpenClaw's 1M Weekly Active Users

https://stack.convex.dev/optimizing-openclaw
2•handfuloflight•51m ago•0 comments

Cuba rejects U.S. Embassy request to bring in fuel, calls it 'shameless'

https://www.washingtonpost.com/world/2026/03/20/us-embassy-havana-cuba-fuel-blackout/
10•ParentiSoundSys•55m ago•1 comments

9 Ways to Fail at Installing a Browser Extension

https://danbuilds.online/notes/9-ways-to-fail-at-installing-a-browser-extension/
2•fiestaman•56m ago•0 comments

Show HN: Rover – turn any web interface into an AI agent with one script tag

https://github.com/rtrvr-ai/rover
4•quarkcarbon279•58m ago•3 comments