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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Can you still run old App Store apps?

https://eclecticlight.co/2026/01/22/can-you-still-run-old-app-store-apps/
1•ingve•1m ago•0 comments

pdit: Output-Focused Python Editor

https://pdit.dev/
1•ichverstehe•1m ago•0 comments

Software occlusion culling in Block Game

https://enikofox.com/posts/software-rendered-occlusion-culling-in-block-game/
1•me4502•2m ago•0 comments

Can Humans Smell Rain Better Than Sharks Smell Blood?

https://www.safewaters.ai/posts/humans-smell-rain-better-than-sharks-smell-blood
2•thunderbong•5m ago•0 comments

Learn Japanese alphabet fast in 3 minutes [video]

https://www.youtube.com/watch?v=2qk4gCZuSjk
2•programmexxx•5m ago•0 comments

Show HN: AI-Powered Virtual Haircut Simulator with 360° View

https://shorthairstyles.app/
1•txttosrt•6m ago•0 comments

Show HN: Spine – Verifiable audit logs with BLAKE3 and Ed25519

https://github.com/EulBite/spine-oss
1•mattiaaleo•7m ago•0 comments

Anna's Archive perd son domaine en .org mais reste debout

https://korben.info/annas-archive-domaine-org-suspendu.html
1•frunkp•12m ago•0 comments

Show HN: FlowWatch – Decorator-first file watcher for Python workflows

https://github.com/MichielMe/flowwatch
1•michielme•12m ago•0 comments

Anthropic writes Constitution for Claude it thinks will soon be proven misguided

https://www.theregister.com/2026/01/22/anthropic_claude_constitution/
1•beardyw•12m ago•0 comments

The Data Box; Why "Smarter" AI Feels Dumber

https://blog.nimbial.com/pages/the_data_box
2•ajayarama•14m ago•1 comments

Erdős Problem #347 Solved (AI assisted math)

https://www.erdosproblems.com/forum/thread/347
1•tzury•16m ago•0 comments

Designing an Authentication System: A Dialogue in Four Scenes (1997)

https://web.mit.edu/kerberos/www/dialogue.html
1•vismit2000•24m ago•0 comments

Oldest cave painting could rewrite human creativity timeline

https://www.bbc.com/news/articles/czx1pnlzer5o
1•griffzhowl•29m ago•0 comments

Anthropic's new Claude 'constitution': be helpful, and don't destroy humanity

https://www.theverge.com/ai-artificial-intelligence/865185/anthropic-claude-constitution-soul-doc
1•xparadigm•30m ago•0 comments

Starlink in Iran: How the regime jams the service and what helps against it

https://www.heise.de/en/background/Starlink-in-Iran-How-the-regime-jams-the-service-and-what-help...
3•DeathArrow•38m ago•0 comments

Semantica: Open-source semantic layers, knowledge graphs, and GraphRAG

https://github.com/Hawksight-AI/semantica
2•kaifahmad1•43m ago•1 comments

New Security Vulnerability Database Launches in the EU

https://www.forbes.com/sites/kateoflahertyuk/2026/01/20/new-security-vulnerability-database-launc...
2•cedricbonhomme•45m ago•1 comments

Why Greenland Looks (It's Not) [video]

https://www.youtube.com/watch?v=tK7yTJ8Mk7A
1•handfuloflight•48m ago•0 comments

Graph of All Human Languages

https://dr.eamer.dev/datavis/poems/language/network.html
3•samwho•49m ago•0 comments

Mixing incentives and penalties found key to cutting carbon emissions long term

https://phys.org/news/2025-12-incentives-penalties-key-carbon-emissions.html
1•PaulHoule•49m ago•0 comments

With this tool, you can enjoy NAS functionality even without a NAS

https://quicksend.chat/
1•foodhome•51m ago•0 comments

The Tighter Weave: On Editing and Not Editing

https://hedgehogreview.com/issues/place-and-revolution/articles/the-tighter-weave
1•samclemens•52m ago•0 comments

OpenSkills – Stop bloating your LLM context with unused agent instructions

1•twwch•53m ago•0 comments

Rare Data Hunters [video]

https://www.youtube.com/watch?v=IU4ByUbDKNc
1•DiscourseFan•55m ago•0 comments

Video for ROS2

https://github.com/stryngs/rosVid
1•stryngs42•59m ago•1 comments

We are updating Dokploy's Open Source license

https://dokploy.com/blog/we-are-updating-dokploys-open-source-license
1•raybb•1h ago•1 comments

Show HN: Scribefully is a portfolio/HN-style community for academics & pros

https://scribefully.com/
1•hoag•1h ago•0 comments

CAP theorem: Why Pick Two Misses the Point

https://www.blog.ahmazin.dev/p/cap-theorem-explained
1•artmonk•1h ago•0 comments

US science after a year of Trump

https://www.nature.com/immersive/d41586-026-00088-9/index.html
6•newman314•1h ago•0 comments