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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/

Creative Focus

https://herbertlui.net/creative-focus/
1•herbertl•27s ago•0 comments

OpenAI did not notice Hugging Face hack for a week

https://www.reuters.com/business/its-ai-agent-spent-days-hacking-company-sources-say-openai-did-n...
1•himaraya•9m ago•0 comments

The SharePoint zero-day panic this week is a marketing event

https://tensorust-site.vercel.app/
1•Shmungus•10m ago•0 comments

The computer has been surprising us

https://iwhalen.com/computer-surprise/
1•iwhalen•12m ago•0 comments

Claude used my pipeline to find a counterexample to the Jacobian conjecture

1•JGPTechCo•18m ago•1 comments

The final frontier – 01005 passives (2012)

http://siliconexposed.blogspot.com/2012/06/final-frontier-01005-passives.html
1•gregsadetsky•20m ago•0 comments

The Shape of Apps

https://parakeet.co/blog/the-shape-of-apps/
2•wpm•30m ago•0 comments

Bonsai – a toolkit for building AI chat apps with branchable conversations

https://github.com/Joaoha/Bonsai
1•joaoha•32m ago•0 comments

In desperate need of money so im willing to make anything

1•lowke•32m ago•0 comments

Ask HN: How would I restore this 101 year old postcard?

2•Waterluvian•35m ago•1 comments

Project Babylon: Gerald Bull's Downfall (2006)

https://www.damninteresting.com/project-babylon-gerald-bulls-downfall/
1•networked•36m ago•0 comments

Stripe closed my account with a 0.18% dispute rate

4•rellyattd•38m ago•2 comments

What Happened to WordPerfect? Why the Dominant Word Processor Disappeared

https://www.youtube.com/watch?v=cMnjphv3DQo
3•cable2600•46m ago•1 comments

Show HN: Made a Free Shownotes Generator Website

https://shownotesgenerator.com/
1•wbemaker•47m ago•1 comments

Show HN: OneWayInterview – type a job role, AI builds the async video interview

https://onewayinterview.com/
1•emunova•49m ago•1 comments

LoRA Adapters Generated from Skill.MDs

https://terradev.cloud/tessera
1•Facingsouth•49m ago•0 comments

Open Weights and American AI Leadership

https://www.microsoft.com/en-us/corporate-responsibility/topics/open-weight/
3•haritha1313•55m ago•0 comments

BackSearch – Letting agents search the web

https://www.gr.inc/releases/introducing-backsearch
1•haritha1313•55m ago•0 comments

Cultural moderation of demographic differences in narcissism

https://www.tandfonline.com/doi/full/10.1080/15298868.2025.2593298#abstract
2•bushwart•55m ago•0 comments

Show HN: I rebuilt Microsoft Comic Chat's layout engine in one HTML file

https://arcade.pirillo.com/comic-chatter.html
2•ChrisPirillo•56m ago•1 comments

Amazon cracks down on use of AI images by sellers after New York law

https://www.cnbc.com/2026/07/23/amazon-makes-sellers-label-ai-generated-people-in-images-after-ny...
5•baranul•56m ago•0 comments

Ask HN: Multi dimensional sort (beyond Hilbert curve)

1•adec314•57m ago•0 comments

Florida's Ban on Unnaturally Posed Stuffed Baby Crocodilians

https://www.loweringthebar.net/2026/07/florida-bans-oddly-posed-alligators.html
1•samizdis•57m ago•0 comments

Dimmd – Dark mode for the macOS Apple Mail app

https://www.dimmd.app/
1•spacedawwwg•1h ago•0 comments

Always Tell Your Kids the Truth (2019)

https://www.outsideonline.com/culture/active-families/tell-your-kids-truth/
1•downbad_•1h ago•0 comments

Show HN: Openleetcode – local LeetCode runner where tests live in the repo

https://github.com/therepanic/openleetcode
2•therepanic•1h ago•0 comments

SignFile – Sign anything. One flat price

https://signfile.io/
2•abdullah_eldoud•1h ago•0 comments

There is no free benchmark

https://www.pnas.org/doi/10.1073/pnas.2509757122
1•hhs•1h ago•0 comments

Show HN: A Kakeya Conjecture Game

https://quantisan.github.io/kakeya-game/
1•quantisan•1h ago•1 comments

Sperm Whales blow bubbles to achieve restful, vertical sleep

https://news.st-andrews.ac.uk/archive/sperm-whales-blow-bubbles-to-achieve-restful-vertical-sleep/
8•hhs•1h ago•1 comments