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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

AI for Website Design

https://boltai.dev/
1•atulseth22•11m ago•0 comments

Apple is forcing iPhones to update to iOS 26 to patch security holes

https://sixcolors.com/post/2025/12/apple-is-forcing-iphones-to-update-to-ios-26-to-patch-security...
4•gloxkiqcza•12m ago•0 comments

Claude Code Session Viewer

https://github.com/d-kimuson/claude-code-viewer
1•RebootStr•13m ago•0 comments

Have you ever been accepted after being rejected at first?

https://www.quora.com/Has-anyone-rejected-you-then-accepted-you
1•marysminefnuf•13m ago•1 comments

Show HN: Advent of Refactoring"

https://www.youtube.com/playlist?list=PLXkLI8HXcMo2r9Q5t27aIh-S4guP_I7z1
1•deckiedan•14m ago•0 comments

33 Thomas Street

https://en.wikipedia.org/wiki/33_Thomas_Street
2•petethomas•18m ago•0 comments

Show HN: GuageAI – Free Beta for GitHub Copilot ROI Analytics

https://guageai.com
1•laiqahmad11•19m ago•0 comments

Vanguard Anti-Cheat Security Update: Closing the Pre-Boot Gap

https://www.riotgames.com/en/news/vanguard-security-update-motherboard
1•haunter•22m ago•0 comments

Why Community Translation Falls Short for Your Plugins and Themes

https://wpml.org/announcements/2025/12/why-community-translation-falls-short-for-your-plugins-and...
1•taubek•23m ago•0 comments

A Survey of Dynamic Array Structures

https://azmr.uk/dyn/
1•birdculture•26m ago•0 comments

Ditch textbooks and learn how to use a wrench to AI-proof your job?

https://www.economist.com/international/2025/12/18/ditch-textbooks-and-learn-how-to-use-a-wrench-...
2•helsinkiandrew•28m ago•1 comments

Ask HN: How are you choosing between Sora 2, Veo 2, and Kling?

1•thenextechtrade•28m ago•0 comments

Big bets and broken unicorns: Tiger Global's rise and reckoning

https://restofworld.org/2025/tiger-global-unicorn-investment-crash/
1•Brajeshwar•29m ago•0 comments

Show HN: Kiteform – The Simplest Form Builder

https://kiteform.com
1•18chetanpatel•30m ago•0 comments

Rebuilding state management: How we made our VS Code extension 2× faster

https://www.augmentcode.com/blog/rebuilding-state-management
1•knes•33m ago•0 comments

Swipe Ready AI Dating Photo Generator

https://swipeready.net/
2•zoooey•41m ago•0 comments

Enabling no_new_privs/NoNewPrivs, disabling setuid on Linux

https://www.thkukuk.de/blog/no_new_privs/
2•vyskocilm•43m ago•0 comments

Ask HN: Why isn't the Android app Harmonic able to save directly HN favorites?

1•netfortius•46m ago•0 comments

Show HN: My own stolen JavaScript Server powered by Rust

https://shyam20001.github.io/rsjs/
1•StellaMary•47m ago•0 comments

I built a tool to stop wasting hours on LinkedIn outreach messages

1•mdanjumkamali•1h ago•0 comments

2025 in Review

https://lethain.com/2025-in-review/
2•gpi•1h ago•0 comments

Post-Quantum Cryptography via dynamic JavaScript injection

https://safequard.pqcee.com/
1•khoslaj•1h ago•0 comments

Show HN: LogShield – Deterministic CLI tool to sanitize secrets from logs

https://www.logshield.dev/
2•quietbyte•1h ago•0 comments

The Price of Intelligence – Three Risks Inherent in LLMs

https://cacm.acm.org/practice/the-price-of-intelligence/
2•gpi•1h ago•0 comments

Citizens United 2.0

https://jacobin.com/2025/12/citizens-united-supreme-court-gop
3•wahnfrieden•1h ago•0 comments

The unstoppable rise of renewable energy

https://www.science.org/content/article/breakthrough-2025
4•conroy•1h ago•1 comments

Ask HN: If one day AI brain chips become a thing, would you get it?

3•keepamovin•1h ago•8 comments

GitHub Copilot Agent Skills

https://github.blog/changelog/2025-12-18-github-copilot-now-supports-agent-skills/
3•feynmanquest•1h ago•0 comments

Research team digitizes more than 100 years of Canadian infectious disease data

https://news.mcmaster.ca/mcmaster-research-team-digitizes-more-than-100-years-of-canadian-infecti...
1•XzetaU8•1h ago•0 comments

Private donors pledge 860M euros for CERN's Future Circular Collider

https://home.cern/news/press-release/cern/private-donors-pledge-860-million-euros-cerns-future-ci...
3•thunderbong•1h ago•0 comments