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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/

Why I built gsx instead of just templ

https://jackieli.dev/posts/why-i-built-gsx/
1•jackielii•47s ago•0 comments

Xylem Surfactants Introduce a New Element to the Cohesion-Tension Theory(2017)

https://academic.oup.com/plphys/article/173/2/1177/6115978?login=false
1•rolph•1m ago•0 comments

Why implementing ActivityPub is hard, and why it doesn't have to be

https://hackers.pub/@fedify/2026/why-activitypub-is-hard
1•birdculture•5m ago•0 comments

Keeping Code Reviews from Dragging

https://www.sandordargo.com/blog/2026/06/03/making-reviews-actually-fast
2•locknitpicker•7m ago•0 comments

A 25 question trivia quiz for America's 250th birthday

https://usa250quiz-site.pages.dev/
3•seinvak•7m ago•0 comments

Show HN: Waypoint.nvim – A Neovim plugin for bookmarking lines of code

https://github.com/patrick-sharp/waypoint.nvim
3•patrick-sharp•8m ago•0 comments

Infra Commits – based on Conventional Commits but for infrastructure/operations

https://codeberg.org/devopsguy/infra-commits
2•ohelm•8m ago•1 comments

Terraforming Warfare and International Law

https://opiniojuris.org/2026/02/25/terraforming-warfare-and-international-law/
1•bryanrasmussen•9m ago•0 comments

America's 250th Birthday because a test of Collective Intelligence

https://venturebeat.com/technology/how-americas-250th-birthday-became-a-test-of-ai-powered-collec...
2•bonkerbits•10m ago•0 comments

Show HN: Clipart.free – Public-Domain Clipart

https://clipart.free/
1•nadermx•11m ago•0 comments

Keep Your Skills Sharp the Hard Way

https://explainanalyze.com/p/keep-your-skills-sharp-the-hard-way/
2•sdevonoes•12m ago•0 comments

Miller 6.20.2: Miller and AI, bash/zsh tab-completion, bytes datatype

https://github.com/johnkerl/miller/releases/tag/v6.20.2
2•john_kerl•13m ago•0 comments

AI has torched the market for junior programmers

https://seldo.com/posts/ai-has-torched-the-market-for-junior-programmers/
9•cdrnsf•14m ago•1 comments

Floci: a fast, free, and open-source local AWS service emulator

https://floci.io/floci/
1•Tomte•18m ago•0 comments

Calculator built to teach/experiment with costing LLM chat apps

https://calc.ajinkya.ai/
1•csmonk•20m ago•0 comments

I ran an AI nuclear engineering department for a week

https://charlesazam.com/blog/ai-engineering-department/
1•couAUIA•21m ago•0 comments

RefCam Bayer Leverkusen vs. FC Bayern [video]

https://www.youtube.com/watch?v=5Nuf_Y-tBeI
2•mmarian•22m ago•1 comments

Command and Conquer Generals natively ported to macOS, iPhone, iPad using Fable

https://github.com/ammaarreshi/Generals-Mac-iOS-iPad/tree/main
17•asronline•23m ago•8 comments

The Feeling of Recursion

https://icely.neocities.org/articles/recursion
4•icely•27m ago•0 comments

I built a game where people solve mazes together

https://maze.cleoselene.com/hackernews
2•brunovcosta•29m ago•0 comments

AI-writing-pattern linter that kept flagging my own README

https://github.com/Shirhussain/humanize
3•danishyar•31m ago•0 comments

Show HN: Typocalypse – An Arcade Typing Roguelike

https://typocalypse.florianrudaj.com/
2•florianrudaj•35m ago•0 comments

Putting an Agent in an Orb

https://ampcode.com/notes/putting-an-agent-in-an-orb
2•tosh•41m ago•0 comments

Generative AI creates delicious, sustainable, and nutritious burgers

https://www.nature.com/articles/s41538-026-00953-x
2•nojito•43m ago•0 comments

There Are Few Socialists in America

https://paulkrugman.substack.com/p/there-are-very-few-socialists-in
4•rbanffy•45m ago•0 comments

Image-to-emoji ASCII art generation

https://philatype.github.io/mojsaic/
2•busymom0•47m ago•0 comments

A Little Machine Near the Sun – Ecuador Robot Climbs Chimborazo

https://latinamericanpost.com/science-technology/ecuador-robot-climbs-chimborazo-as-science-gets-...
2•dxs•48m ago•0 comments

Iredis

https://github.com/laixintao/iredis
2•Olshansky•50m ago•0 comments

The Consequences of Caste in Village India

https://nicholasdecker.substack.com/p/the-consequences-of-caste-in-village
4•paulpauper•51m ago•0 comments

A damage accumulation model identifies distinct aging regimes across species

https://www.nature.com/articles/s43587-026-01138-7
4•paulpauper•52m ago•0 comments