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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

Error Analysis for the Global Positioning System

https://en.wikipedia.org/wiki/Error_analysis_for_the_Global_Positioning_System
1•thunderbong•1m ago•0 comments

The Risk of GCP Viewer role: Snapshot bypass of a cross-project disk replication

https://aneviaro.eu/posts/snapshot-based-cmek-bypass/
1•xrustalik•3m ago•0 comments

Homepage Sports Widget – Phase 1: Countdown

https://bugzilla.mozilla.org/show_bug.cgi?id=2036797
1•n_plus_1_acc•7m ago•1 comments

Reinforcement learning in language models recruits a functional welfare axis

https://functionalwelfare.com/
1•paraschopra•8m ago•0 comments

Why Did the Murders Stop in Baltimore?

https://www.thefp.com/p/baltimore-crime-rate-drop
1•RickJWagner•8m ago•0 comments

Show HN: I built a native project management app that respects your privacy

https://getmilestones.app/store/
1•yassiniz•9m ago•0 comments

America's tech-filled classrooms face backlash against school-assigned devices

https://apnews.com/article/school-screen-time-technology-edtech-07958fb159c7cfbceb7bfdb37b2bb726
3•geox•12m ago•0 comments

Backpressure is all you need

https://www.lucasfcosta.com/blog/backpressure-is-all-you-need
2•lucasfcosta•12m ago•0 comments

Copilot Billing Preview

https://copilot-billing-preview.github.com/
1•GaryBluto•12m ago•2 comments

Free WordPress plugin that removes unused CSS

https://wordpress.org/plugins/berq-used-css/
1•hamzamairaj•18m ago•0 comments

After 22 years, you can download Paint.net from the URL 'Paint.net'

https://www.xda-developers.com/after-22-years-paintnet-downloadable-from-url-paintnet/
2•thunderbong•19m ago•0 comments

TaskPaper Reference

https://guide.taskpaper.com/reference/
1•ankitg12•20m ago•0 comments

Show HN: Markal, a productivity tool for creating collaborative calendars

https://markal.app
1•adriandomc•20m ago•0 comments

SpaceX Has Two AI Compute Stories; Only One Generates Revenue

https://davefriedman.substack.com/p/spacex-has-two-ai-compute-stories
1•gmays•23m ago•0 comments

With Claude: Less Coding, More Testing

https://henrikwarne.com/2026/05/31/with-claude-less-coding-more-testing/
3•ingve•27m ago•0 comments

The 2026-07-28 MCP Specification Release Candidate

https://blog.modelcontextprotocol.io/posts/2026-07-28-release-candidate/
1•gmays•27m ago•0 comments

In Malaysia, there was the first violent reaction against age verification laws

https://old.reddit.com/r/privacy/comments/1tq9e24/in_malaysia_there_was_a_bomb_threat_incident/
1•mostcallmeyt•30m ago•0 comments

People Getting Falsely Accused of Using AI to Write

https://nymag.com/intelligencer/article/the-people-getting-falsely-accused-of-using-ai-to-write.html
1•ColinWright•32m ago•0 comments

SICP Video Lectures (1986)

https://groups.csail.mit.edu/mac/classes/6.001/abelson-sussman-lectures/
3•tosh•33m ago•0 comments

Europe versus America: A Response to the Critics

https://paulkrugman.substack.com/p/europe-versus-america-a-response
2•_tk_•36m ago•0 comments

The Impact of AI-Assisted Development on Software Security

https://arxiv.org/abs/2603.15298
1•lucamark•38m ago•1 comments

Dav2d

https://jbkempf.com/blog/2026/dav2d/
17•captain_bender•39m ago•0 comments

The weatherman crucial to D-Day victory

https://www.bbc.com/culture/article/20260528-the-crucial-decision-that-helped-win-d-day
1•mellosouls•43m ago•0 comments

Robots are redefining the war in Ukraine – and forcing Russia onto the back foot

https://www.cnn.com/2026/05/30/europe/ukraine-robots-drones-russia-war-intl
1•rustoo•45m ago•0 comments

Screwing Up

https://www.seangoedecke.com/screwing-up/
3•gfysfm•45m ago•0 comments

Show HN: The Tired Engineer

https://www.thetiredengineer.com/
4•devtanna•46m ago•1 comments

The Despair of the Professor in the Age of A.I

https://www.newyorker.com/news/fault-lines/the-despair-of-the-professor-in-the-age-of-ai
1•NewCzech•47m ago•0 comments

Unlocking the Working Memory of Large Language Models for Latent Reasoning

https://arxiv.org/abs/2605.30343
1•korbip•48m ago•0 comments

Servo 0.2 Release

https://github.com/servo/servo/releases/tag/v0.2.0
1•pimeys•52m ago•1 comments

Selling to China's Muslims

https://www.middleeastbriefing.com/news/selling-to-chinas-muslims/
1•teleforce•55m ago•0 comments