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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/

Former MIT president says the US is losing the innovation race to China

https://www.npr.org/2026/04/25/nx-s1-5772703/former-mit-president-says-the-us-is-losing-the-innov...
1•Brajeshwar•2m ago•0 comments

Voice Modems

https://computer.rip/2026-04-26-voice-modems.html
1•K7PJP•2m ago•0 comments

Human AI Collaboration in LIterature

https://indignified.com/history-of-human-ai-collaboration-in-literature/
1•ZguideZ•4m ago•0 comments

Generative design of novel bacteriophages with genome language models [pdf]

https://www.biorxiv.org/content/10.1101/2025.09.12.675911v1.full.pdf
1•thunderbong•16m ago•0 comments

Built a safety-first options automation tool for covered calls

1•jansonlau•25m ago•0 comments

Why cars charge 5x faster in China when the research is shared?

https://cyrusradfar.com/thoughts/why-cars-charge-5x-faster-in-china/
2•cyrusradfar•31m ago•0 comments

America's Pandemic Car Bubble Is Now Trapping Buyers in Debt

https://www.wsj.com/business/autos/car-owners-debt-negative-equity-3cfcd031
3•JumpCrisscross•32m ago•0 comments

Our Principles

https://openai.com/index/our-principles/
1•salkahfi•46m ago•0 comments

A New Idea to Save the Climate? Dam the Bering Strait.

https://www.nytimes.com/2026/04/24/climate/amoc-bering-strait-dam.html
2•bookofjoe•49m ago•1 comments

Sabastian Sawe becomes first person to break two-hour marathon mark

https://www.rte.ie/sport/athletics/2026/0426/1570275-sawe-becomes-first-man-to-break-two-hour-mar...
2•austinallegro•52m ago•0 comments

Show HN: Nitrum – Rust Toolkit and CLI for AWS Nitro Enclaves

https://github.com/matzapata/nitrum
2•matzapata•53m ago•1 comments

I Learned to Stop Worrying and Love Coding with AI

https://jeffield.net/blog/claude-strangelove-or-how-i-learned-to-stop-worrying-and-love-coding-wi...
1•jsheffie•53m ago•0 comments

The Atari 1200XL – By Paul Lefebvre

https://www.goto10retro.com/p/inside-the-atari-1200xl
1•rbanffy•54m ago•0 comments

Did You Say "Intellectual Property"? It's a Seductive Mirage

https://www.gnu.org/philosophy/not-ipr.html.en
2•MontyCarloHall•57m ago•0 comments

FreeBSD Device Drivers Book

https://github.com/ebrandi/FDD-book
1•myth_drannon•57m ago•0 comments

Jaeger adopts OpenTelemetry at its core to solve the AI agent observability gap

https://thenewstack.io/jaeger-v2-ai-observability/
1•Brajeshwar•58m ago•0 comments

Intel reportedly says it boosted yields by selling what would normally be scrap

https://www.tomshardware.com/pc-components/cpus/intel-reportedly-says-it-boosted-yields-by-sellin...
2•rbanffy•59m ago•0 comments

The tortoise and the hare: will China beat the US in the race back to the moon?

https://www.theguardian.com/science/2026/apr/26/china-us-space-race-moon
3•pseudolus•1h ago•0 comments

Show HN: CheckThisOut – a filtered directory of side hustles and AI tools

https://checkthisout.com/
1•mbahlitz•1h ago•0 comments

SnakeBreak [a Browser Extension Game]

https://addons.mozilla.org/en-US/firefox/addon/snakebreak/
1•programmexxx•1h ago•1 comments

VPinFE – Cross-platform Front end for VPinball

https://github.com/superhac/vpinfe
1•terry107•1h ago•0 comments

JQuake – monitor real-time shaking events in Japan

https://jquake.net/en/
1•pndy•1h ago•0 comments

Statistical Structure and the Evolution of Languages

https://royalsocietypublishing.org/rspb/article/293/2068/20252374/481270/Statistical-structure-an...
1•Anon84•1h ago•0 comments

The Spinor Genus and the Distinguishing Lattice Isomorphism Problem(2024)

https://eprint.iacr.org/2024/1475
1•rolph•1h ago•0 comments

NSF science advisory board fired by Trump administration

https://www.nature.com/articles/d41586-026-01361-7
2•rguiscard•1h ago•1 comments

Show HN: Out Loud – open-source desktop TTS app for macOS/Windows/Linux

https://github.com/light-cloud-com/out-loud
2•julia-kafarska•1h ago•0 comments

Show HN: Logic Designer – Webapp

https://logic-designer.github.io/logic-designer-main/
2•logic-designer•1h ago•0 comments

Show HN: Startup Equity Adventure Game

https://options-game-polymathrobotics.pythonanywhere.com/
7•iliabara•1h ago•3 comments

CIOs struggle to find clarity in their organizations' AI strategies

https://www.cio.com/article/4162949/cios-struggle-to-find-clarity-in-their-organizations-ai-strat...
3•WaitWaitWha•1h ago•0 comments

DeepSeek drops input cache price to 1/10th

https://xcancel.com/deepseek_ai/status/2048440764368347611
5•alecco•1h ago•1 comments