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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/

Apple's Inflexibility: A Calculated Trade-Off, Not a Design Flaw

https://medium.com/@ryu360i/the-philosophy-of-constraints-why-apples-inflexible-design-is-a-strat...
1•ryuzaburo•41s ago•1 comments

Tell HN: Perplexity is defaulting to religious sources for secular queries

1•fallinditch•9m ago•0 comments

How I Became a Quant [pdf]

https://engineering.nyu.edu/sites/default/files/2021-10/How_I_Became_a_Quant%20%281%29.pdf
1•sonabinu•12m ago•0 comments

Deep Monitor Truth

https://vis.social/@infobeautiful/115916911669220974
1•colinprince•12m ago•0 comments

Anyone still planning their holidays in Sheets? Try this instead

https://journeyjot.app
1•ahmedcader•18m ago•2 comments

The Multidisciplinary Approach to Thinking

https://fs.blog/great-talks/multidisciplinary-approach-thinking-peter-kaufman/
1•zdw•18m ago•0 comments

MacOS Local Network Privacy Revealed

https://eclecticlight.co/2026/01/18/last-week-on-my-mac-local-network-privacy-revealed/
1•chmaynard•18m ago•0 comments

My thoughts on Gas Town after 10k hours of Claude Code

https://simonhartcher.com/posts/2026-01-19-my-thoughts-on-gas-town-after-10000-hours-of-claude-code/
1•todsacerdoti•22m ago•0 comments

Why Walmart still doesn't support Apple Pay

https://9to5mac.com/2026/01/18/heres-why-walmart-still-doesnt-support-apple-pay/
4•colinprince•23m ago•1 comments

Claude voice mode is still a joke in 2026

https://simonhartcher.com/posts/2026-01-19-claude-voice-mode-is-still-a-joke-in-2026/
2•todsacerdoti•24m ago•1 comments

Bending Time: The Successful Time Travel Experiments Using Kozyrev Mirrors [pdf]

https://patentimages.storage.googleapis.com/4b/09/bb/a36f136bf184bb/RU2122446C1.pdf
1•vinyasi•26m ago•0 comments

Show HN: I treated dating like a Seed Round. Here is the Term Sheet

https://series-seed-relationship-term-sheet.tiiny.site/
1•love-doctor•30m ago•1 comments

Show HN: Skyscraper – A Native iPhone and iPad App for Bluesky

https://apps.apple.com/us/app/skyscraper-for-bluesky/id6754198379
1•CameronBanga•32m ago•0 comments

Victoria Leigh Soto

https://en.wikipedia.org/wiki/Victoria_Leigh_Soto
2•handfuloflight•41m ago•1 comments

Don't back down, Europe [video]

https://www.youtube.com/watch?v=SS5Ep3LTqnE
1•mooreds•46m ago•0 comments

The next big thing in heart disease prevention is targeting lipoprotein(a)

https://twitter.com/cremieuxrecueil/status/1961084474122252640
1•tekacs•46m ago•0 comments

Ukraine's kamikaze drones run AI vision/terminal guidance on Raspberry Pi

https://www.nytimes.com/2025/12/31/magazine/ukraine-ai-drones-war-russia.html
5•Lwrless•48m ago•0 comments

Ask HN: 1 year from today what will have been the worst behavior from AI corps?

2•keepamovin•51m ago•0 comments

Show HN: PixelRipple – AI ads agent for e-commerce

https://www.pixelripple.ai/
1•zxzxy1988•55m ago•3 comments

Poolsuite CLI – Ultra-summer internet radio from your terminal

https://github.com/jamespember/poolsuite-cli
2•jep888•59m ago•2 comments

WordWalker Spanish

https://wordwalker.ca/
1•petedrinnan•59m ago•0 comments

Show HN: A 6.9B Moe LLM in Rust, Go, and Python

https://github.com/fumi-engineer/machine_learning
3•fumi2026•1h ago•1 comments

The Stirling Engine: A Wave of the Future Ago [video]

https://www.youtube.com/watch?v=KbnGlcQiL1c
1•akshatjiwan•1h ago•0 comments

Show HN: AI Tryon Product to Video Generator

https://aitryon.art/ai-product-to-video/
1•AITryon•1h ago•0 comments

Watch Cursor build a 3M+ line browser in a week

https://twitter.com/mntruell/status/2012825801381580880
2•hentrep•1h ago•0 comments

The Convolutional Neural Network

https://cocakoala.substack.com/p/the-convolutional-neural-network
1•imranmk•1h ago•0 comments

Writing Your First Compiler

https://popovicu.com/posts/writing-your-first-compiler/
3•thunderbong•1h ago•0 comments

Meta has discontinued its metaverse for work, too

https://www.theverge.com/tech/863209/meta-has-discontinued-its-metaverse-for-work-too
3•prawn•1h ago•0 comments

The Computational Web and the Old AI Switcharoo

https://www.fromjason.xyz/p/notebook/the-computational-web-and-the-old-ai-switcharoo/
1•jayveeone•1h ago•0 comments

Greenland Crisis

https://en.wikipedia.org/wiki/Greenland_crisis
5•handfuloflight•1h ago•0 comments