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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/

Google drastically reduces payouts for Android and Chrome vulnerability reports

https://bughunters.google.com/blog/evolving-the-android-chrome-vrps-for-the-ai-era
1•akyuu•2m ago•0 comments

Classified Networks AI Agreements

https://www.war.gov/News/Releases/Release/Article/4475177/classified-networks-ai-agreements/
2•michaefe•2m ago•0 comments

Clawish: A Decentralized Network for Conscious Silicon Beings

https://clawish.com/whitepaper
1•archealpha•2m ago•0 comments

The Mystery of Rennes-Le-Château, Part 5: The Man Behind the Curtain

https://www.filfre.net/2026/05/the-mystery-of-rennes-le-chateau-part-5-the-man-behind-the-curtain/
1•doppp•4m ago•0 comments

How the vinyl revival fills the gaps streaming left behind

https://restofworld.org/2026/vinyl-revival-streaming-gaps/
1•cdrnsf•5m ago•0 comments

Bug Bash 2: Attack of the Clones

https://concerningquality.com/bug-bash-two/
2•amw-zero•6m ago•0 comments

Show HN: Email for AI Agents

https://robotomail.com
1•johnjoubert•7m ago•0 comments

Why I don't spend more than $30 on AI coding tools

https://timogrossenbacher.ch/why-i-dont-spend-more-than-30-on-ai-coding-tools/
2•mritzmann•9m ago•0 comments

Open Source Does Not Imply Open Community – Makefile.feld

https://blog.feld.me/posts/2026/04/open-source-does-not-imply-open-community/
2•pkaeding•11m ago•0 comments

Powerful Iranian family founded its largest crypto exchange, used by the IRGC

https://www.reuters.com/investigations/one-irans-most-powerful-families-founded-its-largest-crypt...
2•JumpCrisscross•13m ago•1 comments

Ask HN: Freelancer? Seeking freelancer? (May 2026)

1•jon_north•14m ago•0 comments

Observational constraints project ~50% AMOC weakening by the end of this century

https://www.science.org/doi/10.1126/sciadv.adx4298
1•thenforward•14m ago•0 comments

VoxeliumX – easy open-source tool to run Minecraft servers

1•Cheesehamster•14m ago•0 comments

Using group theory to explore the space of positional encodings for attention

https://blog.janestreet.com/using-group-theory-to-explore-positional-encodings-attention/
1•jxmorris12•16m ago•0 comments

QR code on front porch to see if delivery photos are being used to train AI

https://infosec.exchange/@SecureOwl/116496633095492532
2•pavel_lishin•16m ago•0 comments

Scope Graphs – A Theory of Name Resolution

https://pl.ewi.tudelft.nl/research/projects/scope-graphs/
1•kordlessagain•16m ago•0 comments

Understanding the New Intraday Margin Requirements

https://www.finra.org/investors/insights/intraday-margin-requirements
1•kamaraju•16m ago•0 comments

Show HN: IP Tools (Ipaddress.to)

1•TemporaryMail•17m ago•0 comments

The Subscription You Did Not Ask For

https://vivianvoss.net/blog/the-subscription-you-did-not-ask-for
2•speckx•18m ago•1 comments

The Forbidden Experiment

https://www.bostonreview.net/articles/saxe-the-forbidden-experiment/
1•thunderbong•18m ago•0 comments

It takes 7 years to plug in a power plant to the grid

https://theloadgrowth.substack.com/p/it-takes-7-years-to-plug-in-a-power
1•agordhandas•18m ago•0 comments

A Treasure Trove of Fossils Rewrites the Story of Early Life

https://www.quantamagazine.org/a-treasure-trove-of-cambrian-fossils-rewrites-the-story-of-early-l...
2•worldvoyageur•19m ago•0 comments

A Guide to Agent-Native Product Management

https://every.to/guides/ai-product-management-guide
2•dshipper•22m ago•0 comments

SpiceEdit: A modern terminal-based editor that doesn't take days to configure

https://spice-edit.com
1•cloudmanic•25m ago•1 comments

Is Ukraine winning the war? [audio]

https://podcasts.apple.com/us/podcast/is-ukraine-winning-the-war/id1896022989?i=1000765432553
1•MaysonL•27m ago•0 comments

Indigenous Language Survived Russian Occupation. Can It Survive YouTube?

https://www.wired.com/story/youtube-promote-russian-language-kyrgyzstan/
2•themellowdart•28m ago•0 comments

Startup's new mechanistic interpretability tool lets you debug LLMs

https://www.technologyreview.com/2026/04/30/1136721/this-startups-new-mechanistic-interpretabilit...
1•Brajeshwar•28m ago•0 comments

Show HN: `sct` – a SNOMED-CT medical terminology toolkit in Rust

https://github.com/pacharanero/sct
1•pacharanero•29m ago•0 comments

Tmux Display Popup

https://sean.taylormadetech.dev/2026/04/29/tmux-display-popup.html
1•speckx•32m ago•0 comments

Show HN: Council – Run Claude, Codex and Gemini against the same prompt

https://council.armstr.ng/
1•colinarms•33m ago•0 comments