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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

The Indie Hacker Economy Is a Pyramid Scheme

https://medium.com/westenberg/the-indie-hacker-economy-is-a-pyramid-scheme-d06cb5789648
1•latexr•1m ago•0 comments

China State Media Says Support for Open AI Models Has Limits

https://www.bloomberg.com/news/articles/2026-07-27/china-state-media-says-support-for-open-ai-mod...
1•maxloh•7m ago•1 comments

Warden – run a fleet of coding agents without losing your mind

https://github.com/srjn45/warden
1•srjn45•8m ago•0 comments

Shake: Stimulating Haptics Add-In for Kinematic Enhancement

https://github.com/sideline-int/SHAKE
1•wertyk•10m ago•0 comments

Git Without a Forge

https://www.chiark.greenend.org.uk/~sgtatham/quasiblog/git-no-forge/
1•olexsmir•12m ago•0 comments

How Unix spell ran in 64 kB of RAM

https://blog.codingconfessions.com/p/how-unix-spell-ran-in-64kb-ram
2•donw•14m ago•0 comments

Opus Cost = Minimum Wage in South Africa

2•bridgettegraham•16m ago•0 comments

Show HN: We built an MCP server for document generation

https://docuqueue.com/#mcp
1•dvcoolarun•20m ago•0 comments

Why does everything feel so joyless?

https://www.theguardian.com/us-news/ng-interactive/2026/jul/26/age-of-decadence-pleasure-ai
1•mattjhall•24m ago•0 comments

Ask HN: Where do those LLM-generated outreach emails come from?

2•nicbou•27m ago•0 comments

Modern email can be built from borrowed parts

https://en.andros.dev/blog/d7ed8b07/modern-email-can-be-built-from-borrowed-parts/
2•andros•29m ago•0 comments

Would you choose £50k over the chance of £1M?

https://yougov.com/en-gb/daily-results/20260722-c0b92-3
2•yzydserd•32m ago•1 comments

Elevated errors on Claude Opus 5

https://status.claude.com/incidents/lhqp09kxq7pb
3•flyaway123•37m ago•1 comments

Sam Altman says we are in the singularity

https://www.businessinsider.com/sam-altman-openai-the-singularity-agi-prediction-anthropic-nvidia...
1•ColinEberhardt•38m ago•1 comments

Show HN: adCasa OS – AI marketing workspace built with Bayesian attribution

https://adcasa.io/
1•adcasa•39m ago•0 comments

Nvidia in talks with OpenAI to guarantee $250B financing for data center

https://www.reuters.com/business/media-telecom/nvidia-talks-with-openai-guarantee-250-billion-fin...
1•01-_-•40m ago•0 comments

Zeiss expands German site that caps ASML's EUV scanner output

https://www.tomshardware.com/tech-industry/zeiss-expands-german-site-that-caps-asmls-euv-scanner-...
1•01-_-•42m ago•0 comments

Doom Running on a Regex Engine

https://4rh1t3ct0r7.github.io/doom-regex/
1•abareplace•43m ago•0 comments

Meta launched a new AI optimism ad set to a song about human extinction

https://techcrunch.com/2026/07/23/meta-launched-a-new-ai-optimism-ad-set-to-a-song-about-human-ex...
6•robin_reala•47m ago•0 comments

Do Agent Benchmarks Measure Capability? Protocol Validity in the Age of Agentic

https://arxiv.org/abs/2607.22368
1•sbulaev•50m ago•0 comments

I'm running the ICFP programming contest

https://eieio.games/blog/im-running-the-icfp-programming-contest/
1•birdculture•50m ago•0 comments

The AI bioweapon risk isn't jailbreaks

https://point.free/blog/the-ai-bioweapon-risk-isnt-jailbreaks/
1•cafkafk•52m ago•1 comments

Keigo Higashino, author of The Devotion of Suspect X, dies at 68

https://www.oricon.co.jp/news/2470322/
4•linzhangrun•59m ago•0 comments

Even in Utah Families Are Getting Smaller

https://www.nytimes.com/2026/07/25/us/politics/utah-birth-rate-fertility-decline.html
2•geox•1h ago•0 comments

Show HN: A browser-based vector animation engine rendering animated objects

https://thorvg-janitor.vercel.app/
4•hermet•1h ago•2 comments

Show HN: I made a convenient and fast file sharing service

https://coldfiles.dev/
2•bunchy7s•1h ago•5 comments

Show HN: Comparing stock returns after cyber incidents

https://incidentimpact.com/
3•0xad•1h ago•1 comments

Build internal tools for your Startup with Construct AI

https://construct.computer/blog/build-internal-tools-with-construct/
1•ankushKun•1h ago•0 comments

From Seed to Startup: How AI Is Revolutionizing Cannabis Cultivation

https://www.researchgate.net/publication/410602482_From_Seed_to_Startup_How_AI_Is_Revolutionizing...
1•fofoz•1h ago•0 comments

Could a Neuroscientist Understand a Microprocessor?(2017)

http://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1005268
1•num42•1h ago•0 comments