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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/

Why Law Is Law-Shaped

https://lawvm.org/why-law-is-law-shaped/
1•ekns•2m ago•0 comments

Show HN: AI powered coding interview practice

https://protechstack.com/practice
2•vampiregrey•7m ago•0 comments

SHOW HN: 50k+ Shopify Store Database Leads with Niche Segmentation

https://kanbauser.gumroad.com/l/shopifyleads
1•nazbasho•7m ago•0 comments

Trump: Australia's media bargaining laws 'foreign extortion'

https://www.theguardian.com/media/2026/apr/29/trump-australia-news-bargaining-laws-extortion
1•KnuthIsGod•9m ago•0 comments

Payphone Tag

https://hackaday.com/2026/04/28/payphone-tag-is-australias-new-national-sport/
1•altilunium•11m ago•0 comments

Taylor Swift files trademarks for voice and image amid concern over AI misuse

https://www.theguardian.com/music/2026/apr/27/taylor-swift-trademarks-voice-image-ai
1•JeanKage•11m ago•0 comments

US to issue new 'America250' passports featuring Donald Trump's image

https://www.theguardian.com/us-news/2026/apr/28/donald-trump-passports
2•KnuthIsGod•12m ago•0 comments

Quantum Computing and Blockchain [pdf]

https://assets.ctfassets.net/sygt3q11s4a9/6EjYavuGdtJDYCqaJrASj9/9f464a8bf26f44bd6c85710fe7e4a29f...
2•Tomte•16m ago•0 comments

Aihumanbench

1•AIhumanbench•16m ago•1 comments

Rspack 2.0: a 10x faster Webpack built in Rust

https://rspack.rs/blog/announcing-2-0
3•AbuAssar•20m ago•0 comments

Why I Still Reach for Lisp (& Scheme) Instead of Haskell

https://jointhefreeworld.org/blog/articles/lisps/why-i-still-reach-for-scheme-instead-of-haskell/...
8•jjba23•22m ago•1 comments

Product Thinking for Open Source Library Design

https://pckt.blog/b/krzysu/product-thinking-for-open-source-library-design-qzw69a9
6•krzysu•26m ago•0 comments

A free solution to the GitHub Actions supply chain crisis

https://developerwithacat.com/blog/202604/github-actions-supply-chain-commit/
1•pabs3•31m ago•0 comments

Mining magnate Andrew Forrest takes Meta 2 court over scam ads using his likenes

https://www.abc.net.au/news/2026-04-17/andrew-forrest-battles-meta-over-fake-ads/106574806
3•asdefghyk•31m ago•1 comments

The Wrong Black Box Problem

https://dekodiert.de/en/articles/das-falsche-black-box-problem
9•sdoering•33m ago•0 comments

The EC is turning Google Search into a privacy and national-security risk

https://blog.lukaszolejnik.com/the-european-commission-is-turning-google-search-into-a-privacy-an...
6•negura•34m ago•0 comments

Building a Basic Cache with SQLite

https://alexwlchan.net/2026/sqlite-cache/
7•ingve•35m ago•0 comments

Why C++ Wins in Finance(2026)

https://www.youtube.com/watch?v=InLxLEqg_fs
7•theawesomekhan•35m ago•0 comments

Ubuntu silicon-optimized inference snaps for AI

https://canonical.com/blog/canonical-releases-inference-snaps
5•jmngomes•36m ago•0 comments

Show HN: LLM-assisted reconstruction of partially decompiled Minecraft 26.1.2

https://github.com/stevefan1999-personal/demcstify
8•stevefan1999•37m ago•0 comments

Ask HN: How are you stopping supply chain attacks via compromised dev keys?

5•CountVonGuetzli•40m ago•0 comments

The world is rejecting science and truth, here are 5 ways to fight back

https://www.theguardian.com/commentisfree/2026/apr/28/world-rejecting-science-truth-five-ways-fig...
6•JeanKage•42m ago•0 comments

Native vs. Cross Compilation: A Love Story,a War Story and a Debugging Nightmare

http://carminatialessandro.blogspot.com/2026/04/native-vs-cross-compilation-love-story.html
5•throw324du•44m ago•0 comments

Back Up and Running

https://blog.tindie.com/2026/04/back-up-and-running/
15•zimpenfish•45m ago•2 comments

Vanishing Culture: A New Book on the Loss of Our Digital Memory

https://blog.archive.org/2026/04/23/introducing-vanishing-culture-a-new-book-on-the-loss-of-our-d...
5•robtherobber•46m ago•0 comments

The Great Oxidation Event: How Cyanobacteria Changed Life

https://asm.org/articles/2022/february/the-great-oxidation-event-how-cyanobacteria-change
8•thunderbong•46m ago•0 comments

How to distribute skills to your engineers

https://newsletter.port.io/p/how-to-build-a-skills-library-for-your-engineering-team
10•krakenwake•48m ago•0 comments

Predictive pursuit emerges in high-dimensional recurrent neural networks

https://www.biorxiv.org/content/10.64898/2026.04.23.720457v1
7•paraschopra•48m ago•0 comments

Tell HN: An update from the new Tindie team

18•altairprime•49m ago•3 comments

Beijing Auto Show: more EV models in each of 17 halls than in the US

https://electrek.co/2026/04/26/beijing-auto-show-2026-insane-glimpse-future-auto-industry/
4•Geekette•51m ago•0 comments