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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/

Half-Life 2 Official Soundtrack Metal Mashup [video]

https://www.youtube.com/watch?v=HmzSmp8F85c
1•Eridanus2•3m ago•0 comments

The Einstein-Szilard Refrigerator

https://invention.si.edu/invention-stories/einstein-szilard-refrigerator
1•EndXA•4m ago•0 comments

FBI Shuts Down Sprawling China-Linked Hacking Network

https://www.wsj.com/tech/cybersecurity/fbi-shuts-down-sprawling-china-linked-hacking-network-61ea...
4•bmau5•7m ago•0 comments

This week in AI-native companies #5: Stripe buys the meter

https://www.insideainative.com/p/this-week-in-ai-native-companies-b77
2•mmayernick•7m ago•0 comments

Contested Tony Hsieh will signature appears illegitimate, forensic experts say

https://www.8newsnow.com/news/local-news/contested-tony-hsieh-will-signature-appears-illegitimate...
1•pseudolus•7m ago•0 comments

Show HN: Chroncal – A TUI for Calendar

https://github.com/DouglasdeMoura/chroncal
1•douglasdemoura•8m ago•0 comments

Automated Synthesis of Cloud Emulators

https://arxiv.org/abs/2608.23842
1•metrofun•8m ago•0 comments

The Tariff Cost: analysis of the costs to Americans from new tariffs on Canada

https://thetariffcost.com/
2•mikestorrent•8m ago•0 comments

Vox, a systems language whose code reads like English

https://vox-lang.dev/
2•TheJostler•8m ago•1 comments

Their Problem Is That We Have Taste

https://clintavo.substack.com/p/their-problem-is-that-we-have-taste
3•herbertl•10m ago•0 comments

Hacker News, Sans AI

https://elijahpotter.dev/hnsansai
3•fussylogic•10m ago•1 comments

How well do agents use your design system?

https://www.sanity.io/engineering/design-system-evals
1•kmelve•11m ago•0 comments

America's immigration policy is driving away future AI leaders

https://restofworld.org/2026/us-immigration-rules-ai-talent-china/
4•herbertl•12m ago•1 comments

Show HN: Railo – Deterministic security patch bot using AST and Z3 (no LLMs)

https://www.railo.dev
1•mdzariflatif•13m ago•0 comments

Moscow Turned AI into a Ghostwriting Machine for Global Influence

https://united24media.com/world/how-moscow-turned-ai-into-a-ghostwriting-machine-for-global-influ...
5•whynotmaybe•16m ago•0 comments

Actualis – read what your coding agent did on your machine

https://github.com/digital-foundry/actualis
3•actualis•16m ago•0 comments

I measured the x402 economy. It's $11,748 a month

https://github.com/dhughes6071/driftwatch/blob/main/research/posts/x402-economy-measured.md
2•dhughes6071•17m ago•0 comments

Germany plans sugar tax that includes sugar free drinks

https://brusselssignal.eu/2026/08/germany-plans-sugar-tax-that-includes-sugar-free-drinks/
3•sva_•17m ago•1 comments

Physlint – deterministic integrity checks for physical-AI data

https://github.com/pranayjoshi/physlint
2•pranay_joshi•18m ago•0 comments

I Am Looking for Work

https://www.technotheoria.org/p/i-am-looking-for-work
4•paulpauper•18m ago•0 comments

AI's Bar Mitzvah Moment? From Hope and Hype to Hard Business Questions

https://aswathdamodaran.substack.com/p/ais-bar-mitzvah-moment-from-hope
4•paulpauper•19m ago•0 comments

Tailcat: Secure Tunnels in Seconds (Tailscale)

https://github.com/tailscale/tailcat
17•nderjung•21m ago•1 comments

An ongoing 3D-printer AGPL violation

https://lwn.net/SubscriberLink/1089390/46116614cc74b814/
15•Velocifyer•22m ago•2 comments

Fixing Rust's supply chain security: The good, the bad and the ugly

https://kerkour.com/fixing-rust-supply-chain-security
2•speckx•22m ago•0 comments

Show HN: I made a retirement simulator: 125 years of data, 25 countries

https://foresightplanner.com/
8•nhootan•22m ago•1 comments

Freevalve: The camless engine, told properly

https://notenoughcylinders.com/en/freevalve-camless-engine-koenigsegg-2/
2•fchicken•24m ago•1 comments

Anonymous and open to all: The Home Assistant survey dataset

https://www.openhomefoundation.org/blog/home-assistant-survey-dataset/
4•calcifer•26m ago•0 comments

Tell HN: Even HN is getting heavy traffic by AI crawlers

6•ksec•27m ago•3 comments

The Index Is Not the World

https://pub.towardsai.net/the-index-is-not-the-world-de26b0e0a7d3?sharedUserId=carmineds.pro
2•cadeos•29m ago•0 comments

Nanobubble Chemistry Enables Catalyst‑Free Ammonia Synthesis in Mild Conditions

https://english.cas.cn/newsroom/research-news/202608/t20260824_1188763.shtml
2•bookofjoe•29m ago•0 comments