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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

Are these AI prompts damaging your thinking skills?

https://www.bbc.com/news/articles/cd6xz12j6pzo
1•01-_-•30s ago•0 comments

Starlink satellite just exploded and left 'trackable' debris

https://www.engadget.com/science/space/a-starlink-satellite-just-exploded-and-left-trackable-debr...
1•ljf•9m ago•0 comments

Trump Media and TAE Technologies unite in a high-stakes mega fusion deal

https://comuniq.xyz/post?t=635
2•01-_-•15m ago•0 comments

Show HN: Contextual Engineering – Patterns for Building Offline-First AI Agents

https://github.com/tflux2011/contextual-engineering-patterns
1•tflux3011•16m ago•1 comments

Girl Names That Were Originally More Popular for Boys (2021)

https://www.scarymommy.com/girl-names-formerly-boy-names
1•Tomte•17m ago•0 comments

Waymo temporarily suspends service in SF amid power outage

https://www.sfgate.com/bayarea/article/waymo-temporarily-suspends-service-sf-amid-power-21254917.php
2•drfuchs•18m ago•1 comments

Das Flugsimulator 5 Buch

https://www.thomas-huehn.com/das-flugsimulator-5-buch/
1•Tomte•23m ago•0 comments

Gallery of Babel

https://www.echohive.ai/gallery-of-babel/
1•ustad•24m ago•0 comments

Glory (Optical Phenomenon)

https://en.wikipedia.org/wiki/Glory_(optical_phenomenon)
1•thunderbong•26m ago•0 comments

Profile of Josh Woodward, head of Google Labs that turned around Gemini app

https://www.cnbc.com/2025/12/20/josh-woodward-google-gemini-ai-safety.html
2•thoughtpeddler•30m ago•0 comments

Inca Stone Masonry

https://www.earthasweknowit.com/pages/inca_construction
3•jppope•39m ago•0 comments

What features can we add to a black hole?

2•DinakarS•40m ago•0 comments

Clair Obscur has 'Game of the Year" title stripped away over AI use

https://www.thegamer.com/clair-obscur-expedition-33-indie-game-awards-goty-stripped-ai-use/
5•anigbrowl•50m ago•0 comments

Mochi: New window insulation blocks heat, but not your view

https://www.colorado.edu/today/2025/12/11/new-window-insulation-blocks-heat-not-your-view
3•bluehat974•50m ago•0 comments

Ruby's Website Got an Overhaul

https://www.ruby-lang.org/en/
8•psxuaw•59m ago•0 comments

Show HN: Free Roblox GamePlay Video Generator Tool (Inreels.ai)

https://www.inreels.ai/tools/free-roblox-video-maker
2•Onekiran•1h ago•0 comments

Driving Xiaomi's Electric Car: Are We Cooked? [video]

https://www.youtube.com/watch?v=Mb6H7trzMfI
2•baxtr•1h ago•0 comments

How the Resistors Put Computing into 1960s Counter-Culture

https://spectrum.ieee.org/teenage-hackers
2•oldnetguy•1h ago•0 comments

Weight-loss jabs: What happens when you stop?

https://www.bbc.com/news/articles/cn98pdpyjz5o
3•notepad0x90•1h ago•0 comments

Chinese surveillance based on US tech is used to silence Tibetans in Nepal

https://apnews.com/article/china-tibet-nepal-surveillance-technology-silicon-valley-eadac8211c5d0...
6•aspenmayer•1h ago•1 comments

New study reveals that AI cannot write like a human

https://www.ucc.ie/en/news/2025/new-study-reveals-that-ai-cannot-fully-write-like-a-human.html
3•giuliomagnifico•1h ago•0 comments

Stop Losing Intent: Absent, Null, and Value in Rust

https://minikin.me/blog/presence-rs
3•lukastyrychtr•1h ago•0 comments

Show HN: Unrag (open-source) – Add RAG as source files, not dependencies

https://unrag.dev
2•tanaylakhani•1h ago•0 comments

"Koyunbaba Op. 19" (Carlo Domeniconi) Performed by Julia Schüler

https://www.youtube.com/watch?v=xIheg9EM8xM
2•ofalkaed•1h ago•0 comments

Nvidia X Palantir, Global Surveillance, "Pre-Crime" Arrests, & AI [Video]

https://www.youtube.com/watch?v=5lYsO4k7OIY
3•IlikeKitties•1h ago•0 comments

The hidden cost of video-call glitches

https://www.nature.com/articles/d41586-025-03820-z
2•XzetaU8•1h ago•0 comments

Elon Musk's SpaceX bought millions worth of Cybertrucks Tesla can't sell

https://electrek.co/2025/12/18/elon-musks-spacex-bought-tens-of-millions-worth-of-cybertrucks-tes...
7•MilnerRoute•1h ago•0 comments

Show HN: Local and mobile-first all-in-one productivity app, with E2E encryption

https://home.journalit.app/
2•haidoit•1h ago•0 comments

Former DeepMind engineer (possibly) experiences LLM pyschosis

https://xcancel.com/davidmbudden/status/2002549962958401849#m
6•E-Reverance•1h ago•2 comments

Show HN: I built a privacy-first image converter that runs in the browser

https://www.ezfilechanger.com
2•waqaar-ansari•1h ago•0 comments