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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/

Make ZIP files smaller with ZIP Shrinker

https://evanhahn.com/make-zip-files-smaller-with-zip-shrinker/
1•zdw•4m ago•0 comments

FCP – Free Communication Protocol

https://fcp.md/
1•chalyi•4m ago•1 comments

Add –implementation-language flag to Bun

https://github.com/oven-sh/bun/issues/30897
1•quasigloam•22m ago•0 comments

Show HN: Built a verifiable, open-source SoC 2 readiness scanner

https://loxeai.com
1•arjavmehta•28m ago•0 comments

Show HN: I built a free PDF editor to fix Claude's horribly-generated PDFs

https://composer-sepia.vercel.app
2•chaidhat•29m ago•1 comments

Quick, Draw - can a neural network learn to recognize doodling?

https://quickdraw.withgoogle.com/
1•nilsbunger•29m ago•0 comments

Independent dev's physics code stuns PhysicsSE admin

https://physics.stackexchange.com/questions/872398/self-organizing-acceleration-and-stability-in-...
1•spenx•30m ago•0 comments

Fisker went bankrupt and owners built an open source car company from the ashes

https://electrek.co/2026/05/16/fisker-ocean-open-source-ev-story-after-bankruptcy/
5•breve•30m ago•0 comments

OpenAI seals deal in Malta to give all Maltese access to ChatGPT Plus

https://finance.yahoo.com/sectors/technology/articles/openai-seals-deal-malta-maltese-103120887.html
1•embedding-shape•30m ago•0 comments

Self-Complementary Graphs

https://mathworld.wolfram.com/Self-ComplementaryGraph.html
1•lorenzohess•32m ago•1 comments

Curl maintainer: AI security reports are no longer slop

https://daniel.haxx.se/blog/2026/04/22/high-quality-chaos/
2•notRobot•37m ago•0 comments

Show HN: Anagardens: A Daily Word Game

https://www.anagardens.com/
1•mperrotta•38m ago•0 comments

The offline desk gadget that got me to sit up straight

https://techcrunch.com/2026/05/16/the-offline-desk-gadget-that-actually-got-me-to-sit-up-straight/
1•jnord•42m ago•1 comments

Insdubai.com: Motor insurance policies, data of insured persons was exposed

https://write-ups.security-chu.com/2026/05/insdubai-data-breach-incident.html
1•news_rt•43m ago•0 comments

Quantum-COSMOLOGICAL ALIGNMENT (d=16)

https://github.com/lizbeth307/quantum-superactivation-refutation
1•NeoOdim•46m ago•0 comments

Near-Earth Asteroid 2026 JH2 close encounter: 18 May 2026

https://www.virtualtelescope.eu/2026/05/12/near-earth-asteroid-2026-jh2-extremely-close-encounter...
1•rolph•47m ago•0 comments

My Thoughts on Bun's Rust Rewrite

https://en.liujiacai.net/2026/05/16/bun-rust-port/
2•jwzxgo•49m ago•0 comments

Singapore Former Prime Minister Lee Hsien Loong's Sudoku Solver Written in C++

https://github.com/Doppp/LHL-Sudoku-Solver
1•doppp•55m ago•0 comments

Let's Talk about Benchmarks

https://spacetimedb.com/blog/benchmarking
1•ChadNauseam•56m ago•0 comments

My Son's Math Homework Is Essentially Just Pokémon

https://www.theatlantic.com/technology/2026/05/homework-video-games-ed-tech/687198/
3•tekdude•57m ago•0 comments

Arm Holdings to Face US Antitrust Probe

https://www.bloomberg.com/news/articles/2026-05-15/arm-holdings-said-to-face-us-antitrust-probe-o...
7•fork-bomber•1h ago•0 comments

OpenAI is offering ChatGPT Plus to citizens of Malta for a year

https://www.engadget.com/2174473/openai-is-offering-chatgpt-plus-to-citizens-of-malta-for-a-year/
1•SpyCoder77•1h ago•0 comments

Assembly Language – Jesse Colin Jackson's Marching Cubes

https://www.creativeapplications.net/project/assembly-language-jesse-colin-jacksons-marching-cubes/
2•figomore•1h ago•0 comments

Your brain is always a fraction of a second behind the present

https://www.sciencefocus.com/the-human-body/brain-lives-past
3•amichail•1h ago•0 comments

Experimental weight-loss drug outperforms original GLP-1s

https://www.foxnews.com/health/experimental-obesity-drug-outperforms-traditional-weight-loss-trea...
2•paulpauper•1h ago•0 comments

We built a zero-telemetry Native Rust AI engine. (Ghost Lock included)

https://github.com/jrabbass/-esai-community-edition
1•jrabbass•1h ago•0 comments

Show HN: QuantTakeoff – Construction PDFs to takeoff and 3D scene

1•acaciabengo•1h ago•0 comments

Ane: CLI editor that uses LSPs to let agents explore/edit code with fewer tokens

https://github.com/prettysmartdev/ane
3•archnet•1h ago•0 comments

AI's eyes to help with component inspections

https://newsreleases.sandia.gov/ai-inspections/
1•hhs•1h ago•0 comments

Show HN: Where do I stand? – Household Health

https://wheredoistand.me/
1•vgrocha•1h ago•0 comments