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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1mo ago

Comments

trane_project•1mo 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/

School Discipline Makes a Comeback

https://www.wsj.com/opinion/school-discipline-states-texas-arkansas-washington-covid-trump-obama-eeceba4c
1•sandwichsphinx•6m ago•0 comments

Building Multi-Agent Systems (Part 2)

https://blog.sshh.io/p/building-multi-agent-systems-part
1•sshh12•11m ago•0 comments

Solving Wordle with uv's dependency resolver

https://mildbyte.xyz/blog/solving-wordle-with-uv-dependency-resolver/
1•mildbyte•13m ago•0 comments

How the Biosphere 2 experiment changed our understanding of the Earth

https://www.bbc.com/future/article/20250703-how-the-biosphere-2-experiment-changed-our-understanding-of-the-earth
2•breve•15m ago•0 comments

Think slow, think fast (2016)

http://datagenetics.com/blog/december32016/index.html
1•josephcsible•17m ago•0 comments

Wikipedia Sandbox

https://en.wikipedia.org/wiki/Wikipedia:Sandbox
2•esadek•21m ago•0 comments

The Dalai Lama says he hopes to live more than 130 years

https://apnews.com/article/india-dalai-lama-buddhism-birthday-130-98ea3c4c4db8454ea56a7a123ac425ec
1•geox•21m ago•1 comments

Show HN: From Photos to Positions: Prototyping VLM-Based Indoor Maps

https://arjo129.github.io/blog/5-7-2025-From-Photos-To-Positions-Prototyping.html
2•accurrent•22m ago•0 comments

Elon Musk launches new America Party

https://www.dw.com/en/elon-musk-launches-new-america-party/a-73171209
5•layer8•26m ago•1 comments

Elon Musk's Favorite Drug Explained

https://www.vox.com/health/415600/elon-musk-ketamine-therapy-depression-risks
1•wslh•26m ago•1 comments

Under the Hood of Claude Code

https://pierce.dev/notes/under-the-hood-of-claude-code/
1•icyfox•28m ago•0 comments

Stop Hiding My Controls: Hidden Interface Controls Are Affecting Usability

https://interactions.acm.org/archive/view/july-august-2025/stop-hiding-my-controls-hidden-interface-controls-are-affecting-usability
3•cxr•32m ago•0 comments

Can you see circles or rectangles? Does the answer depend on where you grew up?

https://www.theguardian.com/commentisfree/2025/jul/05/optical-illusions-see-world-perception
1•etiam•33m ago•0 comments

JSON Parser in 111 lines of Haskell (2019) [video]

https://www.youtube.com/watch?v=N9RUqGYuGfw
1•battle-racket•33m ago•0 comments

From a recent presentation of the brand new restoration of TRON [video]

https://www.youtube.com/shorts/yHqP6XgHSl8
2•CharlesW•35m ago•0 comments

I'm trying to cool the planet using bacteria – here's the idea

https://osf.io/pmbnk/
1•icevector•40m ago•1 comments

WeSellRemotely – The Daddy of All Remote Sales Job Boards

https://wesellremotely.com/
2•figoshi•45m ago•1 comments

RFK's proposal to let bird flu spread through poultry

https://www.livescience.com/health/flu/rfks-proposal-to-let-bird-flu-spread-through-poultry-could-set-us-up-for-a-pandemic-experts-warn
5•anjel•45m ago•0 comments

Day 47 of using Claude Code

https://solmaz.io/log/2025/07/05/day-47-of-claude-code/
1•hosolmaz•47m ago•1 comments

Operators, Not Users and Programmers

https://jyn.dev/operators-not-users-and-programmers/
8•todsacerdoti•1h ago•1 comments

See how your AI chatbot works on Slack or Mircosoft teams

https://www.signalzen.com/
1•kristis•1h ago•0 comments

7-Zip 25.00

https://github.com/ip7z/7zip/releases/tag/25.00
2•pentagrama•1h ago•0 comments

Show HN: SimTool – Terminal UI for iOS Simulator Management

https://github.com/azizuysal/simtool
1•azizuysal•1h ago•0 comments

What a Hacker Stole from Me

https://mynoise.net/blog.php
4•wonger_•1h ago•1 comments

The Right Way to Embed an LLM in a Group Chat

https://blog.tripjam.app/the-right-way-to-embed-an-llm-in-a-group-chat/
3•kenforthewin•1h ago•6 comments

Programming Meets Poetry: Crawling Ganjoor to Visualize Hafez's Words

https://medium.com/@sirwanamini/programming-meets-poetry-crawling-ganjoor-to-visualize-hafezs-words-0a3226a884c7
3•yubblegum•1h ago•0 comments

Harmonagon

http://harmonagon.com
2•downboots•1h ago•0 comments

Reflections on 2 years of CPython's JIT Compiler: The good, the bad, the ugly

https://fidget-spinner.github.io/posts/jit-reflections.html
4•bratao•1h ago•1 comments

Introducing ZFS AnyRaid

https://hexos.com/blog/introducing-zfs-anyraid-sponsored-by-eshtek
8•KyleSanderson•1h ago•2 comments

Bacterial Code

https://twitter.com/karpathy/status/1941616674094170287
3•twapi•1h ago•1 comments