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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/

Barrer

https://en.wikipedia.org/wiki/Barrer
1•thunderbong•49s ago•0 comments

Key E-3 AWACS Damaged in Iranian Attack

https://www.airandspaceforces.com/key-e-3-awacs-aircraft-damaged-iranian-attack-saudi-air-base/
2•inaros•1m ago•0 comments

Why do SF billboards hit different?

2•YouAreExisting•1m ago•0 comments

Israeli soldiers echo settler ideology after detaining CNN crew

https://www.cnn.com/2026/03/27/middleeast/israeli-soldiers-settler-ideology-detain-cnn-crew-latam...
1•inaros•2m ago•0 comments

Show HN: Deep dive into how NAV calculation is done

https://www.navquant.com/blog/ultimate-guide-nav-calculation
1•navquant•5m ago•0 comments

IDF Air Crew Member Suspected of Betting on Iran War in Polymarket

https://www.haaretz.com/israel-news/israel-security/2026-03-29/ty-article/.premium/second-idf-air...
1•inaros•8m ago•1 comments

Can LLMs bring the Berkshire Hathaway web site into the 21st century?

https://philip.greenspun.com/blog/2026/02/06/can-llms-bring-the-berkshire-hathaway-web-site-into-...
1•vixen99•11m ago•1 comments

People. Ex-Epic Games Talent

https://awesomepeoplelist.replit.app/
2•mariuz•17m ago•0 comments

Researchers examine how AI chatbots are shaping government operations

https://phys.org/news/2026-03-ai-chatbots.html
1•Brajeshwar•20m ago•0 comments

Keys on Doormats: Exposed API Credentials on the Web

https://arxiv.org/abs/2603.12498
1•geox•24m ago•1 comments

The Multibillion-Dollar Foundation That Controls the Humanities

https://www.theatlantic.com/magazine/2026/03/mellon-foundation-humanities-research-funding/685733/
1•herbertl•28m ago•1 comments

Significant progress made on Xbox 360 recompilation

https://readonlymemo.com/rexglue-xbox-360-recompilation-interview/
1•tetrisgm•29m ago•0 comments

Meta's victim-blaming failed to sway jurors in social media addiction trial

https://www.theguardian.com/technology/2026/mar/29/meta-loss-social-media-addiction-trial
2•phlummox•30m ago•1 comments

The first thing vibe coding builds is confidence it will help you succeed

https://www.theregister.com/2026/03/29/secret_ceo_column_vibe_coding/
1•Brajeshwar•31m ago•0 comments

The only sane way to use Linux

https://amit.prasad.me/blog/sane-nix
3•amitprasad•32m ago•0 comments

BubbleWrap your dev env and agents

https://dpc.pw/posts/bubblewrap-your-dev-env-and-agents/
1•swq115•32m ago•0 comments

Claude Skill Collection

https://github.com/GetBindu/awesome-claude-code-and-skills
1•raahul_rahl•33m ago•0 comments

I wish Bluesky's streaming thing was better

https://mat.leaflet.pub/3mciryxlovs2n
2•mooreds•37m ago•0 comments

I self-taught MIT math

https://www.scotthyoung.com/blog/2023/02/21/diego-vera-mit-challenge-math-physics/
3•DiegoVera•37m ago•0 comments

Show HN: F1 Data – 100 resources across 11 racing series

https://github.com/subinium/awesome-f1
2•subinium•37m ago•0 comments

Liveness Checks as a Captcha Replacement

https://ciamweekly.substack.com/p/liveness-checks-as-a-captcha-replacement
1•mooreds•38m ago•0 comments

Tiny Kit Carson County has grown into a green energy giant

https://coloradosun.com/2026/03/29/kit-carson-county-colorado-renewable-energy-boom-xcel/
1•mooreds•39m ago•0 comments

Taipower submits plans to restart Pingtung nuclear plant

https://www.taipeitimes.com/News/taiwan/archives/2026/03/27/2003854583
1•mpweiher•40m ago•0 comments

Show HN: Amgix – Hybrid Search System, glue included

https://amgix.io/
1•kvasserman•41m ago•1 comments

At 50, Apple confronts its next big challenge: AI

https://techxplore.com/news/2026-03-apple-big-ai.html
1•Brajeshwar•41m ago•0 comments

Show HN: PyNear – exact and approximate KNN, faster than Faiss

2•pcael•43m ago•0 comments

AltClaw – A secure scripting layer for AI agents with a module marketplace

https://github.com/altlimit/altclaw
1•altlimit•47m ago•0 comments

Hadak – a location-based word search connecting users to nearby providers

https://github.com/MTeef/hadak
1•mteef•49m ago•1 comments

Nucleus – A minimalist container engine written in Rust

https://github.com/sumant1122/Nucleus
2•paperplaneflyr•52m ago•0 comments

Redefining Location Privacy: New Tools and Improvements for Android 17

https://android-developers.googleblog.com/2026/03/location-privacy.html
1•hasheddan•53m ago•0 comments