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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/

'Employers are increasingly turning to degree and GPA'

https://fortune.com/2026/01/06/recruiting-college-isnt-dead-top-schools-not-talent-is-everywhere/
1•paulpauper•1m ago•0 comments

Math Academy Review: The Shoe-Tying Method Behind Adaptive Math Learning

https://opened.co/blog/math-academy-review-shoe-tying-method
1•gmays•3m ago•0 comments

Background Jobs for TanStack Start with pg-boss

https://jxd.dev/writing/background-jobs-tanstack-start-pg-boss/
1•jamie_davenport•5m ago•0 comments

Power Mode Plugin for Neovim (2026 Take)

https://github.com/axsaucedo/neovim-power-mode
1•axsaucedo•5m ago•1 comments

Claude dethrones ChatGPT as top U.S. app after Pentagon saga

https://www.axios.com/2026/03/01/anthropic-claude-chatgpt-app-downloads-pentagon
2•doener•6m ago•0 comments

The unreasonable effectiveness of S-Expressions

https://nim-lang.org/araq/sexpressions.html
1•moigagoo•7m ago•0 comments

Hackerbot-Claw: An AI-Powered Bot Actively Exploiting GitHub Actions

https://www.stepsecurity.io/blog/hackerbot-claw-github-actions-exploitation
1•pluc•10m ago•0 comments

Can 'friction-maxxing' fix your focus?

https://www.bbc.com/future/article/20260227-can-friction-maxxing-fix-your-focus
4•jethronethro•12m ago•0 comments

From the Guillotine to Napoleon: The French Revolution in Clothes

https://worldhistory.substack.com/p/the-fashion-counter-revolution
1•crescit_eundo•12m ago•0 comments

Show HN: MCP file tools silently eat your context window.I built one that doesnt

https://github.com/ckanthony/Chisel
2•ckanthony•13m ago•2 comments

The Things We Built (and Broke)

https://theblairwitchprojects.substack.com/p/the-things-we-built-and-broke
1•sg17gweedo•16m ago•1 comments

Horse that fades in as you doomscroll (Userscript)

https://gist.github.com/ravarcheon/606b641df4ade3642fb01bec0950c7c0
2•trms•17m ago•0 comments

Knowledge Priming (Manual RAG)

https://martinfowler.com/articles/reduce-friction-ai/knowledge-priming.html
1•danebalia•17m ago•1 comments

Aura-State: Formally Verified LLM State Machine Compiler

2•rohanmunshi08•19m ago•0 comments

Epstein files reveal deeper ties to scientists than previously known

https://www.nature.com/articles/d41586-026-00388-0
4•Teever•22m ago•0 comments

Official NeuroMoney Launch

https://neuromoney.io/app/
1•LukeHenderson11•23m ago•2 comments

All it takes to poison AI training data is to create a website

https://www.schneier.com/blog/archives/2026/02/poisoning-ai-training-data.html
3•u1hcw9nx•23m ago•1 comments

It's Here (Sort Of)

https://kyefox.com/its-here-sort-of/
2•Kye•25m ago•0 comments

World Chess Championship matches have not had an on-board checkmate since 1929

https://en.wikipedia.org/wiki/World_Chess_Championship_1929
2•haunter•25m ago•2 comments

It doesn't matter if the post was fully AI generated

https://simianwords.bearblog.dev/it-doesnt-matter-if-the-post-was-fully-ai-generated/
3•simianwords•26m ago•1 comments

Inside Anthropic's Killer-Robot Dispute with The Pentagon

https://www.theatlantic.com/technology/2026/03/inside-anthropics-killer-robot-dispute-with-the-pe...
4•eoskx•27m ago•2 comments

Datacentre developers face calls to disclose effect on UK's net emissions

https://www.theguardian.com/technology/2026/mar/01/datacentre-developers-energy-greenhouse-gas-em...
5•devonnull•29m ago•0 comments

DEF Con 33 – Exploiting Shadow Data from AI Models and Embeddings [video]

https://www.youtube.com/watch?v=O7BI4jfEFwA
3•ogig•30m ago•0 comments

Digital products and services are getting worse – but the trend can be reversed

https://www.forbrukerradet.no/news-in-english/digital-products-and-services-are-getting-worse-but...
1•susam•34m ago•0 comments

Should you care about "Good Code" in 2026?

https://blog.dmilicic.com/posts/what-is-good-code-in-2026
1•dmilicic•34m ago•1 comments

Building Jarvis – Parallel Tool-Calling Voice Agent Layer on Top of OpenClaw

https://justaniceguy.ai/posts/001-building-jarvis
2•marliechorgan•34m ago•1 comments

Django ORM Standalone⁽¹⁾: Querying an existing database

https://www.paulox.net/2026/02/20/django-orm-standalone-database-inspectdb-query/
1•pauloxnet•35m ago•0 comments

Show HN: Ccnotifs – macOS Claude Code Terminal Notifications (Tmux Friendly)

https://github.com/polyphilz/ccnotifs
1•polyphilz•35m ago•0 comments

Show HN: A simple dark mode Hacker News reader client built with Htmx and Go

https://news.wingman.actor
1•ChaseRensberger•36m ago•0 comments

What Even Are Breeze, QtQuick, QtWidget, Union..?

https://akselmo.dev/posts/what-are-breeze-widgets-quick-union/
2•todsacerdoti•36m ago•0 comments