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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

Free tool to analyze employee survey data in 60 seconds (no signup)

https://getdistill.tech/landing
1•khnfrhn•1m ago•1 comments

A pretty looking web for a quantum mechanics tool

https://github.com/Jamessfks/mace
1•Jamessfks123•3m ago•0 comments

The Atlantic AI Watchdog

https://www.theatlantic.com/category/ai-watchdog/
1•fortran77•6m ago•0 comments

Poll: How do you think LLMs will affect the job market for software developers?

1•bwestergard•7m ago•0 comments

Show HN: Engram – Memory for AI coding agents (2.5K installs, 80% on LOCOMO)

https://www.engram.fyi
1•tstockham•8m ago•0 comments

Show HN: Openpista – AI Agent for OS Control via Telegram/CLI in Rust

https://github.com/openpista/openpista
1•pista_chio•10m ago•0 comments

Show HN: I put Claude Code inside a Telegram bot for voice memos

https://github.com/baryhuang/ai-meeting-notes-agent
1•buryhuang•13m ago•0 comments

We Built a Video Rendering Engine by Lying to the Browser About What Time It Is

https://blog.replit.com/browsers-dont-want-to-be-cameras
2•darshkpatel•13m ago•0 comments

Show HN: Userscript to Display Age/Karma of HN Users

https://gist.github.com/m4chinations/f6d58711a94077d96cf4157665b0bab3
2•linksbro•17m ago•0 comments

Show HN: A POST only back end framework

https://nile-js.github.io/nile/
1•HusseinKizz•19m ago•0 comments

Anthropic and Palantir Bring Claude to U.S. Intelligence and Defense (2024)

https://investors.palantir.com/news-details/2024/Anthropic-and-Palantir-Partner-to-Bring-Claude-A...
1•notRobot•19m ago•0 comments

Latest progress helping Qwen3-4B Learn

https://github.com/kibbyd/adaptive-state
1•kibbyd1985•35m ago•0 comments

Casting SALT like Metal – What Happens? [video]

https://www.youtube.com/watch?v=HaY-gvgS6JY
1•rmast•36m ago•0 comments

Using Git While Trans

https://code.curly.kiwi/2026/02/27/using-git-while-trans/
4•grandsham•37m ago•0 comments

Elliptic Curve Cryptography

https://growingswe.com/blog/elliptic-curve-cryptography
1•subset•40m ago•0 comments

How many AA batteries does it take to power a PC setup? [video]

https://www.youtube.com/watch?v=U5lskFXDbWs
1•rmast•43m ago•0 comments

I built an AI tool to replace hiring agencies

https://hire-flow-io.netlify.app
1•enima•44m ago•1 comments

Berkshire Hathaway – 2025 annual letter [pdf]

https://www.berkshirehathaway.com/letters/2025ltr.pdf
2•kamaraju•46m ago•0 comments

Why Your Laptop May No Longer Be Where Work Happens

https://clouddataandai.substack.com/p/why-your-laptop-may-no-longer-be
1•mitul_suthar•47m ago•0 comments

Show HN: Word-doodle – browser-based generative doodle text art engine

https://github.com/j-ncel/word-doodle
1•koalux•49m ago•1 comments

Show HN: SpecLock – AI Constraint Engine that stops AI from breaking locked code

https://github.com/sgroy10/speclock
1•sgroy10•57m ago•0 comments

Show HN: A GFM+GF-MathJax/Latex HTML formatting adventure

https://github.com/scottvr/phart/blob/main/docs/GHM-LATEX.md
1•ycombiredd•58m ago•0 comments

Diffusion Models (2024)

https://andrewkchan.dev/posts/diffusion.html
1•vinhnx•1h ago•0 comments

Show HN: I built a free AI study tool– paste notes, get flashcards in 10 seconds

https://prepareyourself.app
1•digi_wares•1h ago•0 comments

Josh Collison and Dwarkesh Patel Interview Elon Musk [video]

https://www.youtube.com/watch?v=BYXbuik3dgA
3•surprisetalk•1h ago•0 comments

Human brain cells on a chip learned to play Doom in a week

https://www.newscientist.com/article/2517389-human-brain-cells-on-a-chip-learned-to-play-doom-in-...
5•alex_young•1h ago•0 comments

Malm Whale in Gothenburg

https://www.atlasobscura.com/places/malm-whale
2•thunderbong•1h ago•0 comments

Plugtest

https://en.wikipedia.org/wiki/Plugtest
2•dhorthy•1h ago•0 comments

Show HN: EmCogni Code, the context engine for the "why" behind your codebase

https://www.emcogni.com/
1•ssbodapati•1h ago•0 comments

Simple Made Inevitable: The Economics of Language Choice in the LLM Era

https://felixbarbalet.com/simple-made-inevitable-the-economics-of-language-choice-in-the-llm-era/
1•puredanger•1h ago•0 comments