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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/

Show HN: Chatty Lingo – A language practicing app

https://www.chattylingo.com
1•farstill•46s ago•0 comments

After Months of War, Trump Says Iran Has Right to Nuclear Program

https://newrepublic.com/post/212003/trump-iran-right-nuclear-program
1•embedding-shape•1m ago•0 comments

The Reason Anthropic's Models Are Offline: A Six-Year-Old Trump Grudge

https://www.techdirt.com/2026/06/16/apparently-the-real-reason-anthropics-models-are-offline-a-si...
1•ndesaulniers•1m ago•0 comments

Coinbase outage postmortem: AWS cooling failure caused cascading breakdown

https://www.infoq.com/news/2026/06/coinbase-aws-failure-postmortem/
1•indynz•2m ago•0 comments

Western Men Are Going Abroad to Find Traditional Wives

https://www.economist.com/culture/2026/04/16/western-men-are-going-abroad-to-find-traditional-wives
1•karakoram•3m ago•1 comments

Desmos Notebook Example Gallery

https://www.desmos.com/gallery/1b48bb5c-1f75-4891-aa51-126bbd7b528f
1•aragonite•4m ago•0 comments

How to check if a macOS app can access the Internet before opening it

https://reverseeverything.com/blog/check-macos-app-network-access/
1•IGHOR•4m ago•0 comments

PGP Manager – A user-friendly approach to PGP

https://github.com/developaaah/pgp-manager
1•developaaah•6m ago•0 comments

Ångstrom used Claude Code to train a model that beat Meta's UMA-OMC

https://anycloud.sh/blog/angstrom-case-study/
2•pombo•6m ago•0 comments

Desmos 3D Graphing Calculator

https://www.desmos.com/3d
1•aragonite•7m ago•1 comments

QualityScreener – build custom scoring models for global stocks

https://qualityscreener.io/
1•madagra•8m ago•0 comments

Censorship Industry: The European Firms Monetizing the DSA

https://foundationforfreedomonline.com/censorship-industry-the-european-firms-monetizing-the-dsa/
1•iamnothere•9m ago•0 comments

Ask HN: Where is the transhumanism discussion in engineering sitting?

1•lewistaariq•9m ago•0 comments

LifeSciBench: Evaluating LLMs on Expert-Level Tasks in the Life Sciences [pdf]

https://cdn.openai.com/pdf/b4299379-0a97-4ffa-8b9b-c3fbb299caa9/lifescibench_preprint.pdf
1•sailingparrot•9m ago•0 comments

FreeSeeker – AI-generated digital products (planners, templates, ebooks)

https://freeseeker.warx.org
2•FreeSeekerShop•10m ago•1 comments

The AI Privacy Problem Isn't What You Tell AI – It's What AI Infers

https://github.com/cnaebadi/ai-disclosure-handbook
1•sewyed•12m ago•1 comments

Storied Colors – a catalogue of named colors

https://storiedcolors.com/
6•susiecambria•12m ago•0 comments

Digital detox or building a personal brand

https://sashawhiddon.substack.com/p/the-contemplations-of-building-a
1•drunx•12m ago•0 comments

Mark Zuckerberg Orders His Employees to Have Fun Again

https://www.gadgetreview.com/mark-zuckerberg-orders-his-employees-have-fun-again-after-devastatin...
3•noleary•15m ago•0 comments

Ed Zitron just disproved the core claim behind his AI bubble case

https://www.obsolete.pub/p/ed-zitron-just-disproved-the-core
2•droidjj•15m ago•1 comments

The AI-native document format

https://doclang.ai/
1•taubek•16m ago•0 comments

David Attenborough's life's work, searchable

https://attenborough-100.vercel.app
2•throw0101a•16m ago•0 comments

Franklin Templeton, a SpaceX private investor, unable to justify Cursor purchase

https://www.bloomberg.com/news/videos/2026-06-16/spacex-pounces-on-60b-cursor-takeover-days-after...
3•gurjeet•21m ago•0 comments

Show HN: I built a spelling app for kids with my 7-year-old

https://spellabee.com/
2•narenst•25m ago•0 comments

Marine Transportation Safety Investigation [Titan] Submersible Implosion [pdf]

https://www.tsb.gc.ca/sites/default/files/2026-06/M23A0169-ENG.pdf
1•azalemeth•26m ago•0 comments

Why Can't Walnut Creek Build 3 Bedroom Apartments with a Playground?

https://kevin.burke.dev/kevin/walnut-creek-single-stair/
4•kevinburke•26m ago•1 comments

EarthBound Beginnings remake hack has released after 19 years of development

https://www.timeextension.com/news/2026/06/after-nineteen-ish-years-of-development-the-original-m...
1•ericzawo•27m ago•0 comments

Show HN: Any Search, One API

https://searchrouter-demo.vercel.app/
1•jpolitzki•28m ago•1 comments

Linux kernel drops AppleTalk support

https://www.phoronix.com/news/Linux-Drops-AppleTalk
3•mmoogle•28m ago•0 comments

Show HN: A Universal Matching Engine

https://www.jeanmemory.com/
1•jpolitzki•28m ago•0 comments