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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/

How the West Could Turn a Trickle of Water into an Endless Supply

https://reasonstobecheerful.world/water-recycling-interview/
1•speckx•2m ago•0 comments

Supreme Court sides with Trump fight tied to speech curbs on immigration judges

https://www.reuters.com/world/supreme-court-sides-with-trump-fight-tied-speech-curbs-immigration-...
2•tartoran•3m ago•0 comments

The Theroretical Upper Limits of the Stock Market

https://jackmaguire.org/blog/theoretical-upper-limit-us-stock-market/
1•magicroot75•3m ago•0 comments

Germany news: Childfree adults to pay more for elder care

https://www.dw.com/en/germany-news-childfree-adults-to-pay-more-for-elder-care/live-77292208
3•randycupertino•3m ago•0 comments

Crowbuster – saving young birds from crows

https://github.com/utsengar/crowbuster
1•indus•4m ago•0 comments

Making a 3D terrain look like pixel-art – at every zoom level

https://www.miximum.fr/revivarium/blog/godot-pixel-art-texture/
2•thibaultj•6m ago•0 comments

Pope Leo warns AI should be 'disarmed' in manifesto on potential dangers

https://www.pbs.org/newshour/show/pope-leo-warns-ai-should-be-disarmed-in-manifesto-on-potential-...
1•randycupertino•7m ago•0 comments

The Ballad of TIGIT

https://www.owlposting.com/p/the-ballad-of-tigit
2•crescit_eundo•9m ago•0 comments

Show HN: I Cloned Gmail

https://github.com/hieunc229/mailflare
1•docuru•9m ago•0 comments

Show HN: Private social media feed with posts only from friends

https://picpocket.io
1•amr_shawky•10m ago•0 comments

The Skeleton Library

https://goodinternet.substack.com/p/interpolatable-archives-part-1
1•speckx•10m ago•0 comments

Seven Steps to Heaven: Amorosi on Miles Davis at 100

https://www.jazztimes.com/blog/seven-steps-to-heaven-amorosi-on-miles-davis-at-100/?v=0b3b97fa6688
1•DemiGuru•10m ago•0 comments

Show HN: Mind-expander, a visual workspace for coding with AI agents

https://github.com/mbbill/mind-expander
1•mbbill•11m ago•0 comments

More Whimsical OEIS Sequences

https://www.jeremykun.com/shortform/2026-05-22-1528/
1•surprisetalk•11m ago•0 comments

When Tornado Weather Hits, These Scientists Break Out the Colored Pencils

https://www.nytimes.com/2026/05/18/weather/nws-storm-prediction-center-maps-forecast.html
1•7402•13m ago•0 comments

AI eyes scanning for bugs create a worrisome Linux security trend

https://www.theregister.com/security/2026/05/23/ai-eyes-scanning-for-bugs-create-a-worrisome-linu...
1•CrankyBear•13m ago•0 comments

Crawlgraph – Backlink lookup using Common Crawl ($99 lifetime)

https://crawlgraph.com
1•pucilpet•13m ago•0 comments

Gen Z is falling behind. Dr. Jared Cooney Horvath argues how to help them [video]

https://www.youtube.com/watch?v=_y03mB01beE
1•phoronixrly•14m ago•0 comments

Show HN: Chunk sidecars for validating agent-generated code before pushing to CI

https://circleci.com/blog/chunk-sidecars/
1•olafmol•15m ago•1 comments

Once you hit about a 20-point IQ gap, communication starts to break down

https://twitter.com/i/status/2058730279804748191
1•Michelangelo11•15m ago•0 comments

DirecTV's Secret War on Hackers (2001)

https://hardware.slashdot.org/story/01/01/25/1343218/directvs-secret-war-on-hackers
2•striking•15m ago•0 comments

The mysterious Hy3 LLM is topping OpenRouter Model Rankings by a large margin

https://minimaxir.com/2026/05/openrouter-hy3/
1•minimaxir•17m ago•0 comments

Soon We Can Banish JavaScript to the ShadowRealm

https://css-tricks.com/soon-we-can-finally-banish-javascript-to-the-shadowrealm/
1•mooreds•18m ago•0 comments

CISA orders feds to patch actively exploited Drupal vulnerability

https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-actively-exploited-drupa...
1•Brajeshwar•19m ago•0 comments

What drawing lines on football pitch taught me about future of human-AI collab

https://singhkays.com/blog/drawing-lines-football-pitch-human-ai/
1•singhkays•20m ago•1 comments

Language Models Need Sleep

https://arxiv.org/abs/2605.26099
1•juxtapose•20m ago•0 comments

Prompt Is Not Runtime

https://lixinge.substack.com/p/prompt-is-not-runtime
2•xgli•20m ago•0 comments

Show HN: Show off your software products and gather a newsletter following

https://cantible.com
1•cwbuilds•21m ago•0 comments

Show HN: Clean Gigabytes of Junk from Your Mac

https://mydevcleaner.com/
1•pcwine•21m ago•0 comments

Gtamaplib: Tools and interfaces to construct and navigate the map of GTA 6

https://github.com/rolux/gtamaplib-vc
1•rolux•21m ago•0 comments