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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/

Altair 8800 rescued at ewaste facility

https://old.reddit.com/r/eWasteFinds/comments/1tcco3o/id_like_to_see_someone_beat_this/
1•qingcharles•5m ago•0 comments

Show HN: I made a tool that writes your launch pack from a URL

https://markey.app
1•R1ck404•7m ago•0 comments

AI agents with shared memory – we published everything they got wrong

https://plato.purplepincher.org/
2•SuperInstance•13m ago•0 comments

Sleep linked to slower ageing: study pinpoints the right amount

https://www.nature.com/articles/d41586-026-01506-8
2•EA-3167•14m ago•0 comments

Crunching the latest data, just for you. Hang tight

2•c64d81744074dfa•14m ago•0 comments

How quickly do browsers implement features?

https://sanand0.github.io/webfeatures/
1•argee•19m ago•0 comments

C++26: String and String_view Improvements

https://www.sandordargo.com/blog/2026/04/29/cpp26-string-string_view-improvements
1•PaulHoule•25m ago•0 comments

Trump Backs Tobacco Firms in Vape Dispute, Prompting FDA Chief's Resignation

https://las-vegas-news.com/trump-backs-tobacco-firms-in-vape-dispute-prompting-fda-chiefs-resigna...
2•petethomas•25m ago•0 comments

Apple Developer Community Recognition

https://developer.apple.com/community/recognition/
1•robert-boehnke•28m ago•0 comments

Show HN: From 30 Photos to an FPS

https://free-visit.net/
2•tmilard•33m ago•0 comments

Nvidia/Numba-CUDA-mlir: CUDA C++-style Python GPU compiler built on MLIR

https://github.com/NVIDIA/numba-cuda-mlir
1•nickwanninger•33m ago•0 comments

Tell HN: Dont use Claude Design, lost access to my projects after unsubscribing

8•pycassa•33m ago•0 comments

Run Claude Code/Codex Sessions on GitHub and Linear Issues

https://lanes.sh/blog/integrations-have-arrived
6•s-xyz•35m ago•0 comments

Behind the scenes of OpenAI's open-source Windows sandbox

https://openai.com/index/building-codex-windows-sandbox/
1•dkundel•39m ago•0 comments

Microsoft researchers find AI models and agents can't handle long-running tasks

https://www.theregister.com/ai-ml/2026/05/11/microsoft-researchers-find-ai-models-and-agents-cant...
2•rbanffy•39m ago•0 comments

Numworks Graphing Calculator

https://www.numworks.com/buy/
2•kaladin-jasnah•39m ago•0 comments

Innovative startup pioneers 3D printing with recycled glass

https://www.tomshardware.com/3d-printing/innovative-startup-pioneers-3d-printing-with-recycled-gl...
2•rbanffy•40m ago•0 comments

Show HN: Like Reddit but for Interactive Simulations

https://www.simloops.com/
3•nerdlogic•40m ago•0 comments

Hello Robot's Wheeled Home Robot Ditches Humanoid Hype

https://spectrum.ieee.org/stretch-4-home-robot
1•rbanffy•43m ago•0 comments

FAA adding transponders to all its airport vehicles after LaGuardia runway crash

https://www.cbc.ca/news/world/transponders-airport-vehicles-air-canada-laguardia-crash-9.7198540
1•cf100clunk•43m ago•0 comments

A desire for a loud car correlates with higher scores on psychopathy and sadism

https://cipp.ug.edu.pl/A-desire-for-a-loud-car-with-a-modified-muffler-is-predicted-by-being-a-ma...
2•doener•44m ago•3 comments

Show HN: This Show HN is NotGen.AI

https://notgen.ai/
1•foote•44m ago•0 comments

Spire: Structure-Preserving Interpretable Retrieval of Evidence

https://arxiv.org/abs/2604.20849
1•PaulHoule•47m ago•0 comments

I took a physics class as a software engineer

https://frigade.com/blog/why-i-took-a-physics-class-as-a-software-engineer
2•pancomplex•47m ago•0 comments

Munich's IT transition: open-source is the default for the new coalition

https://www.heise.de/en/news/Munich-s-IT-transition-Open-Source-is-the-default-for-the-new-coalit...
1•doener•48m ago•0 comments

Great Essays About Biology

https://nikomc.com/essays/30-great-essays.html
2•sebg•48m ago•0 comments

Viral Marketing

1•FDX2018•48m ago•1 comments

Medicare's new payment model is built for AI. Most of the tech world has no idea

https://techcrunch.com/2026/05/12/medicares-new-payment-model-is-built-for-ai-and-most-of-the-tec...
7•brandonb•49m ago•0 comments

More concentrated precipitation decreases terrestrial water storage

https://www.nature.com/articles/s41586-026-10487-7
1•littlexsparkee•50m ago•0 comments

Lobotomized Claude Code: system-prompt overrides for Opus 4.7

https://github.com/skrabe/lobotomized-claude-code
2•opwizardx•51m ago•0 comments