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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/

Uber Lays Off 10% of Employees in Reorganization

https://www.nytimes.com/2026/09/02/technology/uber-layoffs.html
1•xnx•40s ago•0 comments

Claude Code session limits are jacked up with Fable 5.1

https://twitter.com/doodlestein/status/2095001666785305066
1•ramoz•2m ago•1 comments

How a new kind of video business cashed in on America's divided politics

https://www.semafor.com/article/09/02/2026/paid-actors-ai-writing-how-a-new-kind-of-video-busines...
1•jbegley•4m ago•0 comments

AI companies are at risk of making Silicon Valley's mistakes all over again

https://werd.io/ai-companies-are-at-risk-of-making-silicon-valleys-harmful-mistakes-all-over-again/
1•speckx•5m ago•0 comments

Show HN: SufferTrails, the Anti-AllTrails

https://suffertrails.com/
1•richhwang•6m ago•0 comments

Netherlands moves billions in gold to London in 'crisis preparedness' move

https://www.bbc.com/news/articles/cvgy51xlz39o
3•tartoran•6m ago•1 comments

Court rules Google will not have to sell ad exchange after losing antitrust case

https://arstechnica.com/gadgets/2026/09/us-court-rules-google-will-not-have-to-sell-ad-exchange-a...
3•Cider9986•7m ago•0 comments

OneRegex Revera: Regular expressions that give the same answer in every language

https://oneregex.github.io/revera/
1•jedisct1•8m ago•0 comments

So how big *was* Bessent's yentervention?

https://www.ft.com/content/958aa5ab-78e0-40cb-9a18-25e9fd5de233
1•JumpCrisscross•8m ago•0 comments

Show HN: I built a version of Omarchy that runs on Apple Silicon

https://github.com/themartiano/try-omarchy
1•martiano•9m ago•0 comments

Never promise "no network requests"

https://blog.origguard.com/never-promise-no-network-requests/
2•Forges•9m ago•0 comments

Wireless Routers as Motion Detectors

https://www.schneier.com/blog/archives/2026/09/wireless-routers-as-motion-detectors.html
1•DemiGuru•11m ago•0 comments

I Don't Have a Smartphone

https://ploum.net/2026-09-02-i_dont_have_a_smartphone.html
4•speckx•12m ago•1 comments

Show HN: AI-Native Boilerplate – 170+ rules that stop LLMs from drifting.

https://github.com/SrikanthVemulapally/ai-native-boilerplate
1•SrikanthVemulap•12m ago•0 comments

Show HN: Price Dashboard for LLM Inference

https://github.com/tokencanopy/price
2•tokencanopy•17m ago•0 comments

Earth's Organisms Developed via Evolution. What If the Cosmos Did, Too?

https://www.smithsonianmag.com/science-nature/earths-organisms-developed-via-evolution-some-theor...
3•JulianPGough•17m ago•1 comments

LifeOS – Moving You from Current to Ideal State

https://ourlifeos.ai/
2•duck•17m ago•0 comments

NASA's Roman telescope holds promise far beyond mapping the invisible Universe

https://www.nature.com/articles/d41586-026-02764-2
2•thinkingemote•17m ago•0 comments

Show HN: AQ – A multiplayer workspace for coding agents on your own cloud

https://aq.dev/
2•knighthacker•18m ago•0 comments

When do infections lead to long Covid? Closing in on triggers and treatments

https://www.nature.com/articles/d41586-026-02683-2
2•thinkingemote•18m ago•0 comments

EU accelerates plans to break up diplomatic service

https://www.ft.com/content/1e55d948-98e5-4c1a-8a09-51e1311fcf63
1•JumpCrisscross•18m ago•0 comments

Hadavar – an AI-powered keyboard driven email client

https://hadavarmail.com/
1•boxstream•18m ago•1 comments

Exo

https://github.com/exoharness/exo
1•tosh•18m ago•0 comments

Fixing Top-Level Await in Safari

https://webkit.org/blog/18227/fixing-top-level-await-in-safari/
1•tjwds•19m ago•0 comments

OpenBSD Stories: Strange Medieval Devices

http://miod.online.fr/software/openbsd/stories/smd.html
1•zdw•19m ago•0 comments

Connecting every app to every other app

https://blog.val.town/connectors
1•stevekrouse•22m ago•0 comments

Show HN: Gopher – open-source self-hosted Cloudflare Tunnel alternative

https://gopherden.org
1•smalex-z•25m ago•1 comments

ClickGap: Autonomous QA for ClickHouse

https://clickhouse.com/blog/clickgap-autonomous-qa-for-clickhouse
1•samaysharma•26m ago•0 comments

Show HN: MCPay – spend authorization and per-call billing for MCP tools

https://github.com/yiaany/MCPay
1•eugenehizyyo•26m ago•0 comments

Delhi Built a World-Class Metro for a Bargain

https://www.nytimes.com/2026/09/02/headway/india-delhi-metro-public-transit.html
1•JumpCrisscross•26m ago•0 comments