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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

VidSoda is an all-in-one AI creative platform

https://vidsoda.com/
1•nikiki•46s ago•1 comments

Proposal limiting foreign scientists at NIST disrupts Colorado quantum industry

https://coloradosun.com/2026/02/19/colorado-quantum-industry-scientists-foreign-nist-federal-labs/
1•osnium123•1m ago•0 comments

Lamborghini cancels their multi-year EV project

https://www.engadget.com/transportation/evs/lamborghini-ditches-plans-for-its-all-electric-superc...
1•dreadsword•2m ago•1 comments

The Weird OS Built Around a Database [video]

https://www.youtube.com/watch?v=pWZBQMRmW7k
1•surprisetalk•2m ago•0 comments

Record-breaking Antarctic drill reveals 23M years of climate history

https://phys.org/news/2026-02-antarctic-drill-reveals-million-years.html
1•wglb•3m ago•1 comments

The AI productivity boom is not here (yet)

https://www.economist.com/finance-and-economics/2026/02/22/the-ai-productivity-boom-is-not-here-yet
3•andsoitis•5m ago•2 comments

NPM install is stealing your passwords – I built a tool to catch it

https://westbayberry.com/product
2•ComCat•8m ago•1 comments

Lamplight.Cafe

https://lamplight.cafe
2•ryuura•9m ago•0 comments

NASA's Artemis II launch date gets pushed back again

https://qz.com/nasas-artemis-ii-launch-delayed-april
2•bookmtn•12m ago•0 comments

Show HN: MFLScout – Analytics Platform for Metaverse Football League

1•iedayan03•12m ago•0 comments

Claude on Socialization

https://claude.ai/share/486be97b-df4f-4e11-abc9-53021038f141
1•s1gs3gv•14m ago•1 comments

Show HN: CodeAnswr – AI-powered Stack Overflow alternative, free forever

https://codeanswr.com
1•mobinpo•16m ago•1 comments

Show HN: BudgetFast – Upload a bank statement screenshot, AI does the rest

https://budgetfast.co
1•ivanramos•16m ago•0 comments

I made a game about the nihilist penguin

https://store.steampowered.com/app/4343410/ULTRATAP_Demo/
1•luckyape_•20m ago•0 comments

Building DIY Split-Flap Displays (2021)

https://www.partsnotincluded.com/building-diy-split-flap-displays/
2•walterbell•21m ago•0 comments

VibeLattice – A vortex lattice method based on AVL

https://avl.vibefoil.com
1•carabiner•24m ago•0 comments

Underpriced app is now live in app store AI Profit Calculator for Resellers

https://apps.apple.com/us/app/underpriced/id6759008101
1•UnderpricedApp•38m ago•0 comments

They Fought for the CIA in Afghanistan. In America, They're Living in Fear

https://www.nytimes.com/2026/02/23/magazine/zero-units-cia-afghanistan.html
4•jbegley•42m ago•0 comments

It might be time to say goodbye to HTML inputs

https://medium.com/zar-engineering/it-might-be-time-to-say-goodbye-to-html-inputs-f37ccf434cc3
2•obiefernandez•42m ago•1 comments

An online book about how ChatGPT works

https://ericsilberstein1.github.io/how-they-think-book/index.html
1•DenisM•43m ago•0 comments

Blood test boosts Alzheimer's diagnosis accuracy to 94.5%, clinical study shows

https://medicalxpress.com/news/2026-02-blood-boosts-alzheimer-diagnosis-accuracy.html
41•wglb•43m ago•9 comments

Saturated ARC-AGI-2

https://www.ycombinator.com/launches/PWR-confluence-labs-an-ai-research-lab-focused-on-learning-e...
1•eightnoteight•45m ago•0 comments

Google, Apple start testing encrypted RCS on Android and iOS 26.4

https://9to5google.com/2026/02/23/google-messages-encrypted-rcs-iphone/
6•thunderbong•46m ago•0 comments

Show HN: Falcon – Chat-first communities built on Bluesky AT Protocol

3•JohannaWeb•51m ago•0 comments

Some things we've learned about GPU textures at planetary scales

http://richg42.blogspot.com/2026/02/some-things-weve-learned.html
1•vinhnx•51m ago•0 comments

What's in the Housing for the 21st Century Act?

https://bipartisanpolicy.org/explainer/whats-in-the-housing-for-the-21st-century-act/
1•toomuchtodo•53m ago•1 comments

Ask HN: Posthotty.com I kindly ask for feedback to improve my AI vibed website

1•gitprolinux•54m ago•0 comments

Uber launches autonomous vehicles services venture in robotaxi push

https://www.ft.com/content/0c0902f6-f6d8-421d-8767-fe3aaf9a3ce4
2•ryan_j_naughton•56m ago•0 comments

Panasonic, the former plasma king, will no longer make its own TVs

https://arstechnica.com/gadgets/2026/02/panasonic-the-former-plasma-king-will-no-longer-make-its-...
9•mroche•1h ago•3 comments

Show HN: Mouse Tester – visualize raw mouse input in the browser

https://mousetester.net/en
2•greey2026•1h ago•0 comments