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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

Redesigned my email privacy tool's landing page with Claude and signups tripled

https://eml.monster
1•platformx•1m ago•0 comments

The device that kept the downed F-15E navigator alive

https://www.calcalistech.com/ctechnews/article/rkfjlgghzg
1•maxloh•1m ago•0 comments

Improving OpenAI Codex with Repo-Specific Context

https://codeset.ai/blog/improving-openai-codex-with-codeset
1•andre15silva•5m ago•0 comments

Implantable 'charging station' boosts fight against cancer

https://medicalxpress.com/news/2026-03-implantable-station-boosts-cancer.html
1•PaulHoule•5m ago•0 comments

The Team Behind a Pro-Iran, Lego-Themed Viral-Video Campaign

https://www.newyorker.com/culture/infinite-scroll/the-team-behind-a-pro-iran-lego-themed-viral-vi...
1•tantalor•5m ago•1 comments

VisiCalc: The First 'Killer App'

https://www.spacebar.news/visicalc-the-first-killer-app/
1•firasd•5m ago•0 comments

Nash Equilibrium for Terminal Maneuvers

https://r6.ca/blog/20260402T135216Z.html
1•EthanHeilman•5m ago•0 comments

What Running a Multi-Agent Software Project Looks Like

https://www.yella.dev/blog/run-multi-agent-software-project/
1•nyell•6m ago•0 comments

Can AI responses be influenced? The SEO industry is trying

https://www.theverge.com/tech/900302/ai-seo-industry-google-search-chatgpt-gemini-marketing
1•gargan•6m ago•0 comments

Ask HN: How do you track competitor moves without an enterprise budget?

1•peerscope•6m ago•0 comments

San Francisco Sobers Up

https://www.nytimes.com/2026/04/06/opinion/san-francisco-drugs-decriminalization-fentanyl.html
2•mitchbob•6m ago•0 comments

Show HN: I built a navigation app that displays weather along the route

https://navimodo.com/
1•vkatluri•7m ago•0 comments

Tiny Corp Begins Accepting Pre-Orders for Their $10M Exabox

https://www.phoronix.com/news/Tiny-Corp-Exabox-Pre-Order
2•LorenDB•8m ago•0 comments

This Protein Slows the Aging Brain, and We Know How to Counter It

https://www.ucsf.edu/news/2025/08/430551/protein-slows-aging-brain-and-we-know-how-counter-it
1•Anon84•8m ago•0 comments

Latch: Terminal multiplexer, like tmux, with SSH, mosh, and web access built in

https://github.com/unixshells/latch
1•rasengan•9m ago•1 comments

Enduring constraints on grammar revealed by Bayesian spatiophylogenetic analyses

https://www.nature.com/articles/s41562-025-02325-z
1•derbOac•12m ago•0 comments

Dear Heroku: Uhh... What’s Going On?

https://judoscale.com/blog/heroku-whats-going-on
1•doppp•13m ago•0 comments

Germany Doxes "UNKN," Head of RU Ransomware Gangs REvil, GandCrab

https://krebsonsecurity.com/2026/04/germany-doxes-unkn-head-of-ru-ransomware-gangs-revil-gandcrab/
2•Bender•13m ago•1 comments

Show HN: Generative Gemstone Avatars

https://gems.m3000.io/
1•maerzhase3000•15m ago•0 comments

Claude Code is unusable for complex engineering tasks with the Feb updates

https://github.com/anthropics/claude-code/issues/42796
2•StanAngeloff•15m ago•2 comments

We open-sourced an AI-native operating model (CC, 6 languages)

https://framework.ai-native-transformation.com
1•zoyth•16m ago•1 comments

Antique Beef

https://carcinisation.com/2025/11/20/antique-beef/
1•surprisetalk•17m ago•0 comments

Will I ever own a zettaflop?

https://geohot.github.io//blog/jekyll/update/2026/01/26/own-a-zettaflop.html
3•surprisetalk•17m ago•0 comments

Compute FüR Alle

https://simongrimm.substack.com/p/compute-fur-alle
1•surprisetalk•17m ago•0 comments

The smallest number that is infinite

https://lemire.me/blog/2025/09/29/smallest-number-string-that-is-infinite/
3•surprisetalk•17m ago•0 comments

Rock-climbing fish can shimmy up a 50-foot waterfall

https://text.npr.org/nx-s1-5773315
2•mooreds•18m ago•0 comments

No Agenda, No Meeting

https://noagendanomeeting.net
1•mooreds•19m ago•0 comments

Char.social

https://char.social/p/34731
1•poorIy•20m ago•0 comments

Astronomer May Have Witnessed a Comet Stop Its Spin–Then Reverse Its Rotation

https://www.smithsonianmag.com/smart-news/in-a-first-an-astronomer-may-have-witnessed-a-comet-sto...
1•pseudolus•21m ago•0 comments

Book Review: There Is No Antimemetics Division

https://www.stephendiehl.com/posts/no_antimimetics/
1•ibobev•22m ago•0 comments