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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/

Agents Are Thinking: A tiny project exploring text based thinking animations

https://www.threads.com/@theaicontinuum/post/DXniNvyDVQw
1•zane__chen•2m ago•0 comments

Don't prepone it – do the needful. 10 Indianisms we should all be using

https://www.theguardian.com/commentisfree/2016/jan/04/indian-english-phrases-indianisms-english-a...
1•kayo_20211030•5m ago•1 comments

What I Got Wrong Implementing Graph-Based Vector Search

https://dubeykartikay.com/posts/reading-algorithms-like-an-engineer/
1•dubeyKartikay•5m ago•0 comments

Microsoft Edge stores all passwords in memory in clear text, even when unused

https://twitter.com/L1v1ng0ffTh3L4N/status/2051308329880719730
3•cft•5m ago•0 comments

Robot-mediated haptic feedback outperforms vision in violin duo coordination

https://www.science.org/doi/10.1126/scirobotics.aeb1901
1•geox•5m ago•0 comments

Amazon Web Services' plan to make networking disappear

https://www.theregister.com/2026/05/04/amazon_web_services_cupertino_networking_lab/
1•Bender•5m ago•0 comments

In Investing, It's When You Start and When You Finish (2011)

https://archive.nytimes.com/www.nytimes.com/interactive/2011/01/02/business/20110102-metrics-grap...
1•downbad_•7m ago•1 comments

Rumor: Disney to Remove Star Wars Sequel Trilogy from Timeline

https://geeksandgamers.com/remove-star-wars-sequel-trilogy/
2•bilsbie•7m ago•0 comments

Usage-based pricing killing your vibe, here's how to roll your own local AI

https://www.theregister.com/2026/05/02/local_ai_coding_agents/
2•Bender•8m ago•0 comments

Show HN: USD Accounts for Pakistani Freelancers

https://www.rizqfinance.com/
1•pickleballcourt•10m ago•0 comments

Chevrolet Performance eCrate package (400v/200hp)

https://www.chevrolet.com/performance-parts/crate-engines/ecrate
1•mindcrime•10m ago•0 comments

Show HN: I built a personal finance projection tool after outgrowing Excel

https://fignis.io/
1•loroloko•12m ago•0 comments

Deadweight Cognitive Loss, Mass Incarceration, and the Case for Education Reform

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6613125
1•paulpauper•13m ago•0 comments

How A.I. Is Transforming China's Entertainment Industry

https://www.nytimes.com/2026/05/03/world/asia/china-microdrama-ai-backlash.html
1•paulpauper•14m ago•0 comments

Show HN: Isonq – PDF/DXF and STEP to shop quoting

https://isonq.com/demo
1•dantesmaghi•14m ago•1 comments

The Southern Poverty Law Center Indictment

https://marginalrevolution.com/marginalrevolution/2026/05/the-southern-poverty-law-center-indictm...
3•paulpauper•14m ago•0 comments

Wizards of the Coast declines to voluntarily recognize Magic Arena union

https://www.enworld.org/threads/wizards-of-the-coast-declines-to-voluntarily-recognize-magic-aren...
1•pavel_lishin•16m ago•0 comments

AI Has Made Memory Chips One of the Most Profitable Products

https://www.wsj.com/tech/ai-has-made-memory-chips-one-of-the-worlds-most-profitable-products-b062...
1•gmays•16m ago•0 comments

Infinite Image Grids Are Flat Toruses

https://seththompson.com/articles/infinite-image-grids
1•s3th•16m ago•0 comments

Individual knowledge wikis need a sharing system, here is an example

https://github.com/dpetryshchuk/atrium-init
1•dimapetryshchuk•16m ago•1 comments

Apple Plans to Let Users Build Their Own Passes in iOS 27 Wallet App

https://www.bloomberg.com/news/articles/2026-05-04/ios-27-features-apple-plans-to-let-users-build...
1•helsinkiandrew•19m ago•0 comments

Drawy, KDE's first infinite whiteboard app

https://prayag2.github.io/posts/meet-drawy/
2•p4bl0•20m ago•0 comments

A Dark-Money Campaign Is Paying Influencers to Frame Chinese AI as a Threat

https://www.wired.com/story/super-pac-backed-by-openai-and-palantir-is-paying-tiktok-influencers-...
5•thm•21m ago•1 comments

Retail Investors Keep Getting Burned in the Stock Market.They're Piling in Again

https://www.barrons.com/articles/retail-investors-stocks-railroads-wall-street-4df3b7b1
2•laxmena•23m ago•0 comments

Offenders sentenced up to 10 years for spying on TSMC

https://www.taipeitimes.com/News/front/archives/2026/04/28/2003856358
11•ironyman•23m ago•0 comments

Toyota built a $10B private utopia–what's going on in there?

https://arstechnica.com/cars/2026/05/inside-toyotas-10b-private-utopia-big-ideas-few-people-camer...
1•rbanffy•23m ago•0 comments

CNC Adhesive Applicator

https://blog.rahix.de/cnc-adhesive-applicator/
1•pillars•24m ago•0 comments

Software Is Not Sentient

https://karlbode.com/your-software-is-not-sentient/
1•cdrnsf•24m ago•2 comments

Cayman reinsurance growth raises oversight concerns

https://www.insurancebusinessmag.com/reinsurance/news/breaking-news/cayman-reinsurance-growth-rai...
1•petethomas•24m ago•0 comments

QueryShield – secure SQL proxy for AI agents (NL→SQL, AST safety, RLS)

https://queryshield.dev/
1•bch12•26m ago•0 comments