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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/

There Are over 1M NYC Street Signs

https://www.nytimes.com/2026/08/15/nyregion/nyc-street-sign-shop.html
1•donohoe•52s ago•0 comments

The First At-Home Test for Infected Ticks Could Improve Lyme Disease Diagnosis

https://www.smithsonianmag.com/innovation/the-first-at-home-test-for-infected-ticks-could-improve...
1•gmays•2m ago•0 comments

Atlantic Meridional Overturning Circulation

https://marine.copernicus.eu/explainers/phenomena-threats/atlantic-meridional-overturning-circula...
1•alexandrehtrb•6m ago•0 comments

Writergate: Zig I/O Interface Overhaul

https://alexrios.me/blog/writergate/
1•signa11•7m ago•0 comments

Your Estimate Isn't Off Because of Optimism or Inexperience

https://julienreszka.com/blog/your-estimate-isn-t-off-because-of-optimism-or-inexperience/
1•julienreszka•9m ago•0 comments

Splitting a Git Commit

https://blog.gnoack.org/post/git-history-split
2•signa11•10m ago•0 comments

Architectural Sins: Why We Keep Making Them and How We Can Stop

https://www.youtube.com/watch?v=P6fS9-HsZeI
1•aoma_conference•11m ago•0 comments

Show HN: Visually Precise AI Tutoring on iOS

https://useknowable.ai/
3•samuelzxu•13m ago•1 comments

Ask HN: When you sell your company, do you receive the money with a normal wire?

1•supergilbert•13m ago•0 comments

QuoteBench: Matched Scores Can Hide Command-Path Failures

https://arxiv.org/abs/2608.13547
2•ninadwrites•15m ago•0 comments

The Risk in the US-Japan Yen Rescue

https://www.youtube.com/watch?v=yh18YXKMk3g
2•tcp_handshaker•15m ago•0 comments

Show HN: Quasicrystals Animation Playground with WebXR

https://hypnagogic-quasicrystals.github.io/
1•r34•18m ago•0 comments

Why are we having so many (or so few) earthquakes?

https://www.usgs.gov/faqs/why-are-we-having-so-many-or-so-few-earthquakes-has-naturally-occurring...
2•jahnu•21m ago•1 comments

So Who's Going to Buy All These Tokens?

https://horse.energy/who_buys_the_tokens.html
2•aakil•21m ago•0 comments

The Plasticity Thesis: How the Brain Learns to Be Conscious – PMC

https://pmc.ncbi.nlm.nih.gov/articles/PMC3110382/
2•lisper•22m ago•0 comments

Yadda 3.0.0: BDD in the Age of AI Agents

http://www.stephen-cresswell.com/2026/08/15/Yadda-3.0.0-BDD-in-the-Age-of-AI-Agents.html
1•scresswell•23m ago•1 comments

Generating Quantum Entanglement from Sunlight

https://opg.optica.org/captcha/(S(f1tudmft3lfosqlxanpvoxjl))/?guid=0DDB6A44-A99F-4451-B651-A095AB...
2•bookofjoe•23m ago•0 comments

Texas Court Locks Luxembourg-Based Adult Website's Domain

https://thetexasinsider.com/texas-court-locks-adult-websites-domain-after-company-ignores-state-a...
1•ColinWright•23m ago•0 comments

The Next Global Economic Crisis Could Be Made in China

https://www.foreignaffairs.com/china/next-global-economic-crisis-made-china-michael-froman
1•ericmay•23m ago•0 comments

Adversarial Creation and Detection of AI-Generated Social Bot Content

https://arxiv.org/abs/2606.07219
1•Anon84•26m ago•0 comments

Vantage – open-source CS2 player intelligence from Steam, FACEIT and Leetify

https://github.com/k6w/vantage
2•regele•26m ago•0 comments

VictoriaMetrics: AI Policy

https://docs.victoriametrics.com/victoriametrics/contributing/index.html
1•tosh•30m ago•0 comments

Show HN: FrontStep v0.5.2

https://github.com/GiovanniCst/frontstep
3•J_cst•32m ago•0 comments

Does Alpha School Work for Regular Kids?

https://danmeyer.substack.com/p/does-alpha-school-work-for-regular
1•MrBuddyCasino•32m ago•0 comments

GLM-5.3 – The Official Desktop Auditor for Z.AI's Cyber-Engine

https://github.com/ZAI-GLM-5-3/glm-5.3
3•nioj•33m ago•0 comments

Babel: A skyscraper where every Wikipedia edit becomes a brick

https://babel.reppie.org/
2•meetpateltech•36m ago•0 comments

AI Software Development – What Does the Data Say?

https://codemanship.wordpress.com/2026/08/12/ai-software-development-what-does-the-data-say/
3•jesterpm•37m ago•1 comments

PriEco: Customize Your Results Ranking

https://prieco.net/blog/goggles
1•JojoYou•38m ago•0 comments

Traffic Modeling with Sumo: A Tutorial

https://arxiv.org/abs/2304.05982
1•teleforce•38m ago•0 comments

DeepSeek V4 Flash at 278 tok/s, full precision, no quantization

https://runinfra.ai/inference-api/deepseek-v4-flash
2•OsamaJaber•40m ago•0 comments