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The Trump admin is ramping up pressure on states to change election practices

https://apnews.com/article/trump-voting-threat-states-3ec6b7838c97342965416756c0b83496
1•petethomas•2m ago•0 comments

New report highlights reasons for hope in the climate fight

https://www.unep.org/news-and-stories/story/new-report-highlights-five-reasons-hope-climate-fight
1•cybermango•4m ago•0 comments

A New 'Little House' Expands and Updates the Prairie

https://www.nytimes.com/2026/07/08/arts/television/little-house-on-the-prairie-netflix.html
1•indigodaddy•6m ago•0 comments

Verbalizable Representations Form a Global Workspace in Language Models

https://transformer-circuits.pub/2026/workspace/index.html
1•tristenharr•7m ago•1 comments

Earth may survive the sun's death

https://www.space.com/astronomy/earth/earth-may-survive-the-suns-death-after-all-new-study-suggests
1•cybermango•8m ago•0 comments

Show HN: Udemy/Skillshare Meets Clippy

https://missionforgehq.com/
1•Drewsimpson•9m ago•0 comments

Show HN: Jdan's Japan subway station icons

https://trains.jordanscales.com/
1•jordanscales•10m ago•0 comments

NASA begins funding hardware for 'Skyfall' Mars helicopter mission

https://www.space.com/space-exploration/missions/nasa-begins-funding-hardware-for-skyfall-mars-he...
1•cybermango•10m ago•0 comments

Show HN: I ran 70 MCP servers in a sandbox and logged what they do

https://github.com/BhaveshThapar/mcp-audit
1•bthapar•13m ago•1 comments

Creatine doesn't just build muscle. It may also help fight cancer

https://www.sciencedaily.com/releases/2026/07/260701015237.htm
5•Jimmc414•15m ago•1 comments

Tripping on Acid

https://scotmurphy.com/2026/07/08/tripping-on-acid/
2•tekjess•18m ago•1 comments

Policy Statement Concerning the Suppression of Accuracy in AI Systems

https://www.federalregister.gov/documents/2026/07/07/2026-13628/policy-statement-concerning-the-s...
4•sebastian_z•24m ago•1 comments

A Fleet, Not an Assistant

https://bartkolendowski.com/writing/a-fleet-not-an-assistant.html
1•riskcomplex•25m ago•0 comments

Show HN: A shallow lake's report on itself

https://ashallowlake.com/
1•tough•25m ago•0 comments

A Roomba recorded a woman on the toilet. How did screenshots end up on Facebook?

https://www.technologyreview.com/2022/12/19/1065306/roomba-irobot-robot-vacuums-artificial-intell...
7•rmason•30m ago•0 comments

Understanding ECS from Kubernetes Perspective

https://muhammadraza.me/2026/ecs-explained-visually/
4•mraza007•35m ago•0 comments

How to Be a Good open-source Maintainer

https://piechowski.io/post/how-to-be-a-good-open-source-maintainer/
3•grepsedawk•37m ago•0 comments

Show HN: Yaw – digital logbook for glider pilots

https://yawflight.com/
2•mantcz•38m ago•0 comments

Native-speed vLLM transformers modeling back end

https://huggingface.co/blog/native-speed-vllm-transformers-backend
2•simonpure•41m ago•0 comments

Google Vibe Coding vs. Agentic Engineering White Paper

https://www.kaggle.com/whitepaper-the-new-SDLC-with-vibe-coding
2•grepsedawk•41m ago•0 comments

Show HN: A tool that checks how your business appears in AI search

https://www.tryagentscore.com
2•nikhilsiyer•42m ago•1 comments

Every Way Meta Tracks You, and How to Stop It [video]

https://www.youtube.com/watch?v=Yv2Eb_kJous
3•nalekberov•46m ago•0 comments

DSS Code Prime

https://github.com/dailysoftwaresystems/dss-code-prime
2•rgasperetti•46m ago•0 comments

Are Argentina being treated favourably at World Cup?

https://www.bbc.co.uk/sport/football/articles/cx2wkwd7e6go
2•password54321•48m ago•0 comments

Show HN: Day planner shaped like a clock (2-way calendar and Todoist sync)

https://reassign.app
1•smuk3c•49m ago•0 comments

Adsb.fi

https://adsb.fi/
3•rolph•49m ago•0 comments

Lessons from the Vasa Shipwreck

https://www.ft.com/content/200a6c44-9b66-4af3-82eb-98acb53898e4
1•bookofjoe•51m ago•1 comments

'Acceleration without fuel:' superconducting thruster in first orbital test

https://www.space.com/technology/acceleration-without-fuel-revolutionary-superconducting-thruster...
1•breve•53m ago•1 comments

Remote sync, MCP, and an API for your Obsidian vault

https://github.com/8thpark/geode
2•pmihaylov•56m ago•0 comments

The neutral proof standard for consequential AI-agent actions

https://github.com/Actenon
1•Bucko1•59m ago•0 comments
Open in hackernews

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/