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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

Show HN: Floors – DJ mix discovery built around a music knowledge graph

https://floors.music/
1•mattbyrom•57s ago•0 comments

I got over my AI skepticism in data engineering

https://getbruin.com/blog/ai-skepticism-in-data-engineering/
1•arsalann•1m ago•0 comments

Share browser recordings on Cloudflare Pages from the command line

1•keepamovin•1m ago•0 comments

Do you want the US to "win" AI?

https://geohot.github.io//blog/jekyll/update/2026/04/23/us-win-ai.html
1•mefengl•3m ago•0 comments

Base Mac Mini Sold Out from Apple Online Store

https://www.macrumors.com/2026/04/22/base-mac-mini-sold-out-from-apple-online-store/
1•7777777phil•4m ago•0 comments

I LOVE YOU

https://en.wikipedia.org/wiki/ILOVEYOU
1•keepamovin•7m ago•0 comments

Cortex Auth – Rust secrets vault for AI agents (exec-based injection)

https://github.com/davideuler/cortex-auth
1•davideuler•7m ago•1 comments

Trust Me, I'm a Shortcut

https://www.wietzebeukema.nl/blog/trust-me-im-a-shortcut
3•wietze•16m ago•0 comments

Bitwuzla: Satisfiability Modulo Theories (SMT) Solver

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

"Bot or Human?" Is the Wrong Question for the Modern Web

https://blog.cloudflare.com/past-bots-and-humans/
1•emot•19m ago•0 comments

Image Generators Are Generalist Vision Learners

https://arxiv.org/abs/2604.20329
1•mohsen1•21m ago•0 comments

What you can do in a decade

https://twitter.com/swyx/status/2047217611880984935
1•tosh•22m ago•0 comments

AI and Teaching

https://eiexchange.com/content/ai-and-teaching-the-brave-new-world
1•walterbell•23m ago•0 comments

Show HN: We built an OCR server that can process 270 dense images/s on a 5090

https://github.com/aiptimizer/TurboOCR
3•pfdomizer•23m ago•0 comments

Writing a C Compiler, in Zig

https://ar-ms.me/thoughts/c-compiler-1-zig/
2•tosh•24m ago•0 comments

Subscription bombing attacks: patterns, dark web services, and mitigations

https://cacm.acm.org/practice/subscription-bombing-email-under-attack/
1•gannimo•25m ago•0 comments

Show HN: AI Applyd – score, rewrite, auto-apply via cloud browser

https://aiapplyd.com/
1•sneefle•25m ago•0 comments

A new logical model for artificial gravity cores: from pest control to railguns

https://gist.github.com/ryouta19931007
1•hamutarou•29m ago•0 comments

Programming as Theory Building – Peter Naur

https://gist.github.com/onlurking/fc5c81d18cfce9ff81bc968a7f342fb1
1•jonnonz•29m ago•0 comments

FIU Student Arrested After Joking About Netanyahu on WhatsApp

https://www.youtube.com/watch?v=o1Zsb1IijYY
7•enaaem•33m ago•0 comments

Meta layoff wave impacting 8000 jobs

https://www.usatoday.com/videos/news/2026/04/20/meta-layoffs-impacting-8000-employees/89697461007/
2•tcp_handshaker•36m ago•0 comments

Is Starlink a Secret Radar Constellation? [video]

https://www.youtube.com/watch?v=jbp3kdJZ1_A
3•msuniverse2026•42m ago•0 comments

Show HN: Nova by civai, a platform for managed AI agents

https://nova.civai.co/
1•usecodenaija•44m ago•0 comments

RFK Jr. Defends Trump's Mathematically Impossible Drug Discount Claims

https://www.nytimes.com/2026/04/22/us/politics/rfk-jr-trump-impossible-drug-discounts.html
3•tcp_handshaker•44m ago•1 comments

Vision Banana: Image Generators Are Generalist Vision Learners

https://vision-banana.github.io
2•M4v3R•45m ago•1 comments

Show HN: We built a way for Claude Code to join meetings like a real teammate

7•pattern-ai•45m ago•2 comments

Debugging WASM in Chrome DevTools

https://eli.thegreenplace.net/2026/debugging-wasm-in-chrome-devtools/
2•mfrw•49m ago•0 comments

Hackers breach Anthropic's 'too dangerous to release' Mythos AI model

https://www.euronews.com/next/2026/04/22/hackers-breach-anthropics-too-dangerous-to-release-mytho...
2•latexr•50m ago•0 comments

Show HN: Razorpay-universal – A framework-agnostic Razorpay SDK

https://www.npmjs.com/package/razorpay-universal
1•rupamshil111•51m ago•0 comments

SpaceX and Cursor have explored a team-up with Mistral to take on AI rivals

https://www.businessinsider.com/elon-musk-xai-explored-collaborating-with-mistral-cursor-2026-4
2•consumer451•53m ago•1 comments