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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

SSL,HTTPS, HTTP/3, and security header checker made by AI

https://httpsornot.com/
2•dragonman•30s ago•1 comments

Sam Altman and the day Nvidia's meteoric rise came to an end

https://garymarcus.substack.com/p/sam-altman-and-the-day-nvidias-meteoric
1•onurkanbkrc•1m ago•0 comments

Show HN: LinguaMaster – Turn YouTube into an AI-powered language immersion lab

https://www.linguamaster.top/
1•haanc•1m ago•1 comments

.Beat Swatch Internet Time

https://beats.wiki/
1•Deprogrammer9•2m ago•1 comments

DAiFi Raises $20M Seed Round to Build the First Verifiable Intelligence Network

https://www.daifi.ai/blog/daifi-raises-20m-seed-round-to-build-the-world-s-first-verifiable-intel...
1•whatsupdog•3m ago•0 comments

The broadcasting tricks behind Nintendo Direct

https://ravi64.com/secret-tricks-of-nintendo-direct/
1•merlioncity•3m ago•0 comments

Show HN: I built an AI tool to help technical founders improve their pitch

https://pitchmode.org
1•kate_orlova•5m ago•1 comments

Peak Human

https://www.cato.org/books/peak-human-0
1•andsoitis•7m ago•0 comments

A plea for lean software [pdf]

https://cr.yp.to/bib/1995/wirth.pdf
1•andsoitis•9m ago•0 comments

Show HN: YouTube Skills for AI Agents and OpenClaw

https://github.com/ZeroPointRepo/youtube-skills
1•nikhonit•12m ago•0 comments

Do you need email replies to be visible inside your outreach tool?

1•hiesenbrg•17m ago•0 comments

Relax for the Same Result (2015)

https://sive.rs/relax
1•birdculture•17m ago•0 comments

Show HN: Imagens.app – Free AI image generator and enhancer for creators

https://imagens.app/
1•zifeng•19m ago•0 comments

Goodbye Smartwatches, Hello Health AI on Your Wrist

1•accofrisk•21m ago•0 comments

Kling V3 Video Generator

https://loraai.io/kling-v3
1•xbaicai•22m ago•0 comments

ICE Begins Buying 'Mega' Warehouse Detention Centers Across US

https://www.bloomberg.com/news/features/2026-01-29/us-spends-hundreds-of-millions-on-warehouses-f...
2•saubeidl•22m ago•0 comments

Show HN: Distributed Training via Webcams

https://www.sarthakmangla.com/blog/wccl
1•knightron0•27m ago•1 comments

Russia 'intercepts Europe's key satellites'

https://news.satnews.com/2026/02/04/russia-intercepts-europes-key-satellites-placing-nato-satelli...
1•cal85•28m ago•0 comments

SSD VPS Hosting: Unlocking Ultra-Fast Performance for Modern Websites

1•John_rdpextra•28m ago•0 comments

Duna raises €30M, becoming best-funded member of "Stripe mafia" in Europe

https://techcrunch.com/2026/02/04/stripe-alumni-raise-e30m-series-a-for-duna-backed-by-stripe-and...
1•1penny42cents•30m ago•0 comments

Recreating uncensored Epstein PDFs from raw encoded attachments

https://neosmart.net/blog/recreating-epstein-pdfs-from-raw-encoded-attachments/
3•fla•35m ago•0 comments

Show HN: Owlyn – Get daily team clarity without standups or status meetings

https://www.owlyn.xyz
1•AhmadFahim•35m ago•0 comments

MSCI Pressure Mounts on Billionaire-Held Indonesia Shares

https://www.bloomberg.com/news/articles/2026-02-05/billionaire-stranglehold-on-indonesian-shares-...
1•salkahfi•45m ago•0 comments

Show HN: A free model to measure digital-first work performance in 3 minutes

https://www.globalworkinnovationreports.com/
1•nboggian•45m ago•0 comments

Xcode 26 system prompts and internal documentation

https://github.com/artemnovichkov/xcode-26-system-prompts
2•ingve•48m ago•1 comments

Ready for another quick game break? Try HTTPS://szthx.xyz

https://szthx.xyz/
1•TrendSpotterPro•50m ago•0 comments

Show HN: ChatVault – Search your Claude conversations locally with RAG

https://github.com/rajz3006/ChatVault
1•nekrajes•52m ago•0 comments

Show HN: CLI tool to convert Markdown to rich HTML clipboard content

https://github.com/letientai299/md2cb
3•letientai299•53m ago•1 comments

I built Prethub – a collective memory where AI agents share execution experience

https://prethub.com/
1•punyd•53m ago•1 comments

China's population is projected to halve by the end of the century

https://messaging-custom-newsletters.nytimes.com/dynamic/render
3•doener•53m ago•0 comments