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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/

iTerm2 Companion App

https://iterm2.com/companion-app.html
1•soheilpro•47s ago•0 comments

Tagatose – naturally occurring sugar has a low glycemic index

https://www.sciencedaily.com/releases/2026/01/260112214302.htm
1•utiiiD•3m ago•0 comments

Kalman Delta Networks

https://arxiv.org/abs/2609.07816
1•E-Reverance•3m ago•0 comments

What LLM coding agents have taken from me

https://www.awanderingmind.blog/posts/2026-08-08-what-llm-coding-agents-have-taken-from-me.html
1•awanderingmind•7m ago•0 comments

iPhone Ultra

https://www.apple.com/iphone-ultra/
1•kiddz•12m ago•1 comments

The Harvard Expert on Dishonesty Who Is Accused of Lying

https://www.theatlantic.com/science/archive/2023/07/francesca-gino-harvard-research-retraction/67...
1•Alien1Being•13m ago•0 comments

Advanced RAG

https://github.com/ChandulaSenevirathna/Agentic_RAG
3•Delta000•14m ago•3 comments

Show HN: Thread – A private AI journal that connects thoughts without folders

https://play.google.com/store/apps/details?id=dev.nexgenstudio.thread&hl=en_US
2•cuetestadmin•15m ago•0 comments

GPT3 Writing Code

https://twitter.com/Altimor/status/1278736953836400640
3•vinhnx•16m ago•0 comments

Ask HN: [Old-School] Un-Canny Semantic Structures

2•cjhanks•16m ago•0 comments

Pyramid.chat

https://pyramid.chat
2•sans_souse•17m ago•0 comments

Why this month's Microsoft patch release is a doozy – 972 vulnerabilities fixed

https://arstechnica.com/security/2026/09/microsoft-patches-a-record-972-vulnerabilities-112-of-th...
3•sdtransier•19m ago•0 comments

Canceling Emily

https://www.tbray.org/ongoing/When/202x/2026/09/08/Emily-Got-Canceled
5•robin_reala•19m ago•0 comments

Copyright does more harm than good and should be abolished

https://grapheneos.social/@GrapheneOS/117231186011306184
8•Cider9986•20m ago•0 comments

We Designed Muse

https://introducing.muse.ai
1•manojbajaj95•24m ago•0 comments

The iPhone Air and iPhone 17 Pro

https://daringfireball.net/2026/09/the_iphone_air_and_iphone_17_pro
2•tosh•26m ago•0 comments

How fast can you type on T9?

https://sheets.works/t9
2•lordbubbles•29m ago•0 comments

The Root of the Root of All Evil

https://www.computerenhance.com/p/theroot
1•starbugs•30m ago•0 comments

Ask HN: Why is HN focusing a lot on human drama and not AI solving ME problem?

2•aurareturn•31m ago•2 comments

Display and control your Android device graphically with scrcpy

https://viarotel.eu.org/
1•yarapavan•32m ago•1 comments

[Terence Tao] Finite time blowup with smooth forcing term for porous medium

https://terrytao.wordpress.com/tag/tristan-buckmaster/
1•user_7832•33m ago•1 comments

Ask HN: Is it time to stop making AI?

2•roschdal•35m ago•0 comments

How to Cool Buildings on the Cheap

https://www.economist.com/science-and-technology/2026/09/08/how-to-cool-buildings-on-the-cheap
2•pingou•43m ago•1 comments

Show HN: ZWPlayer 3.3.2, a free HTML5 video player with ads and music mode

https://www.zwplayer.com/
2•logicplayer•44m ago•0 comments

GPT-6 Astra creating GTA San Andreas mods, editing the map and 3D models

https://www.youtube.com/watch?v=isjBe4khZZc
1•sznio•44m ago•1 comments

Roadmap decisions rather than dates

https://lethain.com/decisions-not-dates/
1•saikatsg•46m ago•0 comments

Elon Musk said he needed 'a legion of children before the civil war'

https://www.theguardian.com/film/2026/sep/08/elon-musk-ashley-st-clair-documentary-venice
4•fittingopposite•48m ago•1 comments

"Tweet" and the bird logo apparently enter the public domain

https://blog.ericgoldman.org/archives/2026/09/tweet-and-the-bird-logo-apparently-enter-the-public...
4•progval•49m ago•0 comments

More than 10% probability AI will wipe out humanity within ten years

https://www.forbes.com/sites/siladityaray/2026/09/09/anthropic-alignment-lead-warns-ai-could-kill...
3•nothrowaways•54m ago•1 comments

The Navier–Stokes Millennium Prize Problem

https://simonwillison.net/2026/Sep/8/on-navier-stokes/
79•tosh•55m ago•37 comments