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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

Rippling exposed your SSN/banking to anyone who sent you an offer letter

https://infosec.exchange/@SecureOwl/116415101610028363
1•noiobeforebed•38s ago•0 comments

Useknockout – open-source background removal API, 40× cheaper than remove.bg

https://github.com/useknockout/api
1•tlorents•53s ago•0 comments

SF Giants sell piece of team to venture capital firm run by Joshua Kushner

https://www.sfgate.com/giants/article/sf-giants-joshua-kushner-22224927.php
1•iancmceachern•7m ago•0 comments

DevResolve – AI chat widget that answers technical questions from your docs

https://devresolve.ai
1•EthanWayne•8m ago•0 comments

Open source memory layer so any AI agent can do what Claude.ai and ChatGPT do

https://alash3al.github.io/stash?_v01
1•alash3al•10m ago•1 comments

Asking Qwen3.5-9B, running on 16GB VRAM, to exploit old Windows machines

https://thepatrickfisher.com/blog/computers/series-vibe-coding-sec-scan/00-vibe-coding-security-p...
1•sqeak•11m ago•1 comments

Llama 4: A Deep Dive into Liquid Transformers 2.0 and Sovereign AI

https://en.landingfymax.com.br/artificial-intelligence/llama-4-meta-open-source-sovereignty-2026
1•EvCarvalho•14m ago•0 comments

Show HN: Building a local FIX protocol triage agent on an RTX 3070

https://domgalati.substack.com/p/the-fix-triage-agent-building-a-local
1•dgalati•18m ago•0 comments

(Blender) Cosmology with Geometry Nodes

https://www.blender.org/user-stories/cosmology-with-geometry-nodes/
3•shankysingh•26m ago•0 comments

BMW is one step closer to selling you a color-changing car

https://www.theverge.com/tech/918216/bmw-ix3-flow-edition-concept-car-2026-beijing-auto-show-e-in...
2•dmitrygr•31m ago•0 comments

"Plain text has been around for decades and it's here to stay." – Unsung

https://unsung.aresluna.org/plain-text-has-been-around-for-decades-and-its-here-to-stay/
2•rbanffy•31m ago•0 comments

[Show HN] Free Baccarat

https://baccarat.free/
1•cbxyp•34m ago•1 comments

Apple IIc: A smaller, sleeker Apple II from 1984

https://dfarq.homeip.net/apple-iic/
2•rbanffy•35m ago•1 comments

Mypaintr: Plot R graphics like a human

https://hughjonesd.github.io/mypaintr/index.html
1•dash2•35m ago•0 comments

Replace IBM Quantum back end with /dev/urandom

https://github.com/yuvadm/quantumslop/blob/25ad2e76ae58baa96f6219742459407db9dd17f5/URANDOM_DEMO.md
1•pigeons•36m ago•1 comments

Avnac: Open-source local-first Canva alternative

https://avnac.design/
2•bundie•38m ago•0 comments

White House Memo on Adversarial Distillation of American AI Models [pdf]

https://whitehouse.gov/wp-content/uploads/2026/04/NSTM-4.pdf
1•lebovic•41m ago•1 comments

Fast-AI-detector: a fast local CLI for detecting AI-generated text

https://github.com/Ejhfast/fast-ai-detector
1•unignorant•44m ago•0 comments

Google Cloud CEO: Anthropic, TPUs, Mythos, Nvidia and More [video]

https://www.youtube.com/watch?v=bNdiBwXbLNw
2•rdudekul•46m ago•0 comments

Cactus, a work-stealing parallel recursion runtime for C

https://github.com/xtellect/cactus
1•enduku•47m ago•0 comments

These Volcanoes Are Undead

https://nautil.us/when-extinct-volcanoes-reawaken-1280213
1•kristenfrench•53m ago•1 comments

Sam Altman Wants to Know Whether You're Human

https://www.theatlantic.com/newsletters/2026/04/sam-altman-bots-world-id/686950/
1•JumpCrisscross•53m ago•0 comments

Honda CEO says 'we have no chance' against Chinese automakers

https://finance.yahoo.com/sectors/energy/articles/honda-ceo-says-no-chance-020000235.html
2•thelastgallon•53m ago•0 comments

Why Congress may spend $1B on Great Salt Lake

https://www.npr.org/2026/04/24/nx-s1-5746844/why-trump-wants-to-spend-1-billion-on-great-salt-lake
1•kianN•54m ago•0 comments

Is Italy the new tax haven for the global rich?

https://www.bbc.com/worklife/article/20260421-is-italy-the-new-tax-haven-for-the-global-rich
2•andsoitis•1h ago•0 comments

Jeff Bezos is raising his game in space

https://www.economist.com/business/2026/04/23/jeff-bezos-is-raising-his-game-in-space
1•andsoitis•1h ago•0 comments

Bdelloid Rotifer

https://en.wikipedia.org/wiki/Bdelloidea
2•embedding-shape•1h ago•0 comments

Tim Cook wrote a winning recipe for Apple

https://www.economist.com/leaders/2026/04/23/tim-cook-wrote-a-winning-recipe-for-apple
1•andsoitis•1h ago•0 comments

Peter Sarnak – The Riemann Hypothesis [video]

https://www.youtube.com/watch?v=DtaFyE9BcXw
1•delhanty•1h ago•1 comments

Google is building a Claude Code challenger, Sergey Brin is involved

https://www.indiatoday.in/technology/news/story/google-is-secretly-building-a-claude-code-challen...
4•nsoonhui•1h ago•1 comments