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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

Gemini tops leaderboard on research math problems

https://epoch.ai/frontiermath
1•gsf_emergency_6•4m ago•0 comments

LOL

https://www.digitalocean.com/community/tutorials/how-to-create-a-new-user-and-grant-permissions-i...
1•devpbrilius•4m ago•0 comments

We Built Another Object Storage (and Why It's Different)

https://fractalbits.com/blog/why-we-built-another-object-storage/
5•fractalbits•8m ago•1 comments

How to review AI generated PRs

https://thoughtbot.com/blog/how-to-review-ai-generated-prs
1•ben_s•8m ago•0 comments

Take the web for a fresh spin with GenTabs, built with Gemini 3

https://blog.google/technology/google-labs/gentabs-gemini-3/
1•doener•10m ago•0 comments

Philosophy Lectures on YouTube

https://jaredhenderson.substack.com/p/the-best-philosophy-lectures-on-youtube
1•synthetictask•11m ago•0 comments

Could America win the AI race but lose the war?

https://www.ft.com/content/12581344-6e37-45a0-a9d5-e3d6a9f8d9ba
1•pseudolus•19m ago•1 comments

Our First Contact with Aliens Will Be Their Last Words – Eschatian Hypothesis [video]

https://www.youtube.com/watch?v=jSlbplt7GhA
1•hammadmajid•26m ago•0 comments

Germany's train service is one of Europe's worst. How did it get so bad?

https://www.npr.org/2025/12/12/g-s1-100794/germany-train-rail-deutsche-bahn
5•pseudolus•29m ago•0 comments

Toppleware

https://hannibalglaser.dk/toppleware
1•closingreunion•29m ago•0 comments

Show HN: What are your thoughts on this?

https://www.npmjs.com/package/dotenv-diff
1•chrilleweb•29m ago•0 comments

Math Predicting the Death of Nations

https://www.youtube.com/watch?v=B5cMfyFqKmM
1•aranw•31m ago•0 comments

YouTube's CEO limits his kids' social media use – other tech bosses do the same

https://www.cnbc.com/2025/12/13/youtubes-ceo-is-latest-tech-boss-limiting-his-kids-social-media-u...
4•pseudolus•34m ago•0 comments

Aethism, God and Startups

https://vednig.medium.com/aethism-god-and-startups-ed135031af98
1•vednig•34m ago•0 comments

Texas Attorney General Sues Epic for Gatekeeping Medical Data

https://www.texasattorneygeneral.gov/news/releases/attorney-general-ken-paxton-sues-major-medical...
2•jasoneisen•36m ago•0 comments

Using Linear Algebra to Predict a Non-Linear Pendulum

https://chillphysicsenjoyer.substack.com/p/using-linear-algebra-to-predict-a
3•crescit_eundo•38m ago•0 comments

RIP American Tech Dominance

https://www.theatlantic.com/economy/2025/12/trumps-china-ai-chips/685235/
1•breve•38m ago•0 comments

Bohra Cuisine: A Pinch of Salt and Desserts First

https://www.thedawoodibohras.com/bohra-cuisine-a-pinch-of-salt-and-desserts-first/
1•thunderbong•39m ago•0 comments

Recent GeoServer Vulnerability Exploited in Attacks

https://www.securityweek.com/recent-geoserver-vulnerability-exploited-in-attacks/
1•Bender•45m ago•0 comments

OpenAI built an AI coding agent and uses it to improve the agent itself

https://arstechnica.com/ai/2025/12/how-openai-is-using-gpt-5-codex-to-improve-the-ai-tool-itself/
1•Bender•46m ago•0 comments

Online gaming escaped Australia's social media ban-critics say just as addictive

https://www.bbc.co.uk/news/articles/c93w90kqgv9o
1•n1b0m•47m ago•0 comments

Browser Benchmark Test

https://browserbench.org/Speedometer3.1/
1•Bender•49m ago•0 comments

Slide Rule

https://en.wikipedia.org/wiki/Slide_rule
1•tosh•51m ago•0 comments

Gut microbial imbalance can impact memory, says study

https://www.newindianexpress.com/states/kerala/2025/Dec/12/gut-microbial-imbalance-can-impact-mem...
3•sundarurfriend•53m ago•0 comments

Broadcom tumbles 11% after earnings as AI trade sells off

https://www.cnbc.com/2025/12/12/broadcom-tumbles-10percent-after-earnings-as-ai-trade-sells-off-....
2•kristianp•57m ago•1 comments

1.5M Plastic Bottles Are Turned into Clothing Every Day (2024) [video]

https://www.youtube.com/watch?v=FChEek0NSOI
2•mgh2•1h ago•1 comments

Show HN: The Lost World 2030 – A full comic built with HTML+CSS

https://www.google.com/search?q=the+lost+world+2030+&sca_esv=8c8f0d3927118de8&sxsrf=AE3TifNm7oDHP...
2•OSCAR-ORO•1h ago•0 comments

The Number That Turned Sideways

https://zuriby.github.io/math.github.io/the-number-that-turned-sideways.html
1•tzury•1h ago•0 comments

Retroviral insertions contributed to the divergence of human and chimp brains

https://www.biorxiv.org/content/10.64898/2025.12.12.693858v1
1•XzetaU8•1h ago•0 comments

I Fed 24 Years of My Blog Posts to a Markov Model

https://susam.net/fed-24-years-of-posts-to-markov-model.html
2•susam•1h ago•0 comments