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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/

Contract-first AI code generation in Go

https://github.com/yuedongze/govibeimpl
1•yuedongze•44s ago•0 comments

Reddit overtakes TikTok in UK thanks to search algorithms and Gen Z

https://www.theguardian.com/technology/2026/jan/03/reddit-overtakes-tiktok-uk-search-algorithms-g...
1•beardyw•47s ago•0 comments

Show HN: Square Face Generator – A Free Tool to Tell If You Have a Square Face

https://squarefacegenerator.co
1•ivanvolt•2m ago•0 comments

Explosions reported in Venezuelan capital Caracas

https://www.theguardian.com/world/2026/jan/03/explosions-reported-venezuela-caracas
5•beardyw•4m ago•0 comments

Show HN: genex – explore your genetic data and family tree from the terminal

https://github.com/cameronehrlich/genex
1•cameronehrlich•7m ago•0 comments

Ask HN: Would this tool work? Payform

1•DinakarS•9m ago•0 comments

We're not concerned enough about the death of the junior-level software engineer

https://medium.com/@austin-starks/the-death-of-the-code-monkey-why-i-fear-for-the-class-of-2026-1...
1•birdculture•18m ago•0 comments

ISO 216

https://en.wikipedia.org/wiki/ISO_216
2•thunderbong•22m ago•0 comments

The Internet's Last Bottleneck

https://replicated.wiki/blog/args.html
1•gritzko•29m ago•0 comments

At least 7 explosions and low-flying aircraft are heard in Venezuela's Caracas

https://apnews.com/article/venezuela-us-explosions-caracas-ca712a67aaefc30b1831f5bf0b50665e
14•mudil•31m ago•3 comments

I built cloud transcoding 50x cheaper than AWS/Coconut/others – anyone need it?

3•souvlakee•32m ago•0 comments

Programmatic Tool Calling for Agents

https://github.com/zeke-john/codecall
1•zekejohn•34m ago•1 comments

Crypto users forced to share account details with tax officials

https://www.bbc.com/news/articles/ckgl2je65klo
2•chistev•34m ago•1 comments

Rkgk UI — A low latency Digital Art software on the browser

https://github.com/michael-0acf4/rkgk
1•michael-0acf4•38m ago•0 comments

Vaping safer than smoking – so why are people struggling to quit e-cigarettes?

https://www.theguardian.com/society/2026/jan/03/vaping-safer-than-smoking-so-why-are-people-strug...
2•beardyw•38m ago•0 comments

Visualise a Pcap with Zeek and Grafana

https://hackertarget.com/zeek-dashboard-grafana/
1•the_wanderer•42m ago•0 comments

Show HN: Griblet – Free browser-based GRIB file viewer

https://griblet.app
1•itsangaris•42m ago•0 comments

Ask HN: Where can I buy uninhabited islands in the Seychelles or Caribbean?

1•roschdal•43m ago•2 comments

Formal Methods Only Solve Half My Problems

https://brooker.co.za/blog/2022/06/02/formal.html
2•signa11•50m ago•0 comments

Multiple explosions in Venezuela's capital Caracas

https://www.cnn.com/2026/01/03/americas/venezuela-explosions-intl-hnk
44•breppp•50m ago•23 comments

The Case for Blogging in the Ruins

https://www.joanwestenberg.com/the-case-for-blogging-in-the-ruins/
3•ingve•53m ago•0 comments

"Compass nerd" creates new damped compass, gives to public domain

https://www.youtube.com/watch?v=eiDhbZ8-BZI
2•tomcam•54m ago•0 comments

Google Skills

https://www.skills.google/
2•modinfo•55m ago•0 comments

Ask HN: Expository/Succinct Books on Modern Physics

1•rramadass•1h ago•0 comments

Loud noises heard in Venezuela capital, southern area without electricity

https://www.reuters.com/world/americas/loud-noises-heard-venezuela-capital-southern-area-without-...
56•jumpocelot•1h ago•34 comments

"Nobody should stop these experiments from happening"

https://english.elpais.com/climate/2025-12-31/david-king-chemist-there-are-scientists-studying-ho...
2•dr_dshiv•1h ago•0 comments

Norwich firm creates 'virus cocktails' to help farmers

https://www.edp24.co.uk/news/25712243.norwich-firm-creates-virus-cocktails-help-farmers/
1•austinallegro•1h ago•0 comments

Show HN: Image to PDF – client-side image to PDF converter

https://github.com/ivanglpz/v0-image-pdf
2•ivanglpz•1h ago•0 comments

Uber rewrites contracts with drivers to avoid paying UK's new 'taxi tax'

https://www.theguardian.com/technology/2026/jan/02/uber-avoids-new-uk-taxi-tax-rewriting-driver-c...
3•Brajeshwar•1h ago•0 comments

I got 500 devs to try my AI app builder in a week (solo founder, no ads)

https://www.indiehackers.com/post/how-i-got-500-devs-to-try-my-ai-app-builder-in-a-week-solo-foun...
1•genvibe•1h ago•0 comments