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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

The AI breakthrough isn't intelligence – it's existence

1•Kalpaka•39s ago•0 comments

NASA Confirms China's Three Gorges Dam Has Slowed Earth's Daily Rotation (2025)

https://orbitaltoday.com/2025/09/03/nasa-confirms-chinas-three-gorges-dam-has-slowed-earths-daily...
1•thunderbong•45s ago•0 comments

How the Golden Gate Bridge Was Built: A 3D Animated Introduction In

https://www.openculture.com/2026/02/how-the-golden-gate-bridge-was-built-a-3d-animated-introducti...
1•nomagicbullet•1m ago•0 comments

Supreme Court strikes down most of Trump's tariffs in a blow to the president

https://www.nbcnews.com/politics/supreme-court/supreme-court-strikes-trumps-tariffs-major-blow-pr...
1•csomar•2m ago•0 comments

repgrep – Interactive Find/Replace

https://github.com/acheronfail/repgrep
1•dmit•5m ago•0 comments

CircleCI study: code throughput up, delivery down, reliability slipping

https://circleci.com/blog/five-takeaways-2026-software-delivery-report/
2•louiereederson•5m ago•1 comments

Marble Machine X – Siegfrieds Mechanisches Musikkabinett

https://www.smmk.de/en/marble-machines.html
1•mofosyne•5m ago•0 comments

Stack Computers (1989)

https://users.ece.cmu.edu/~koopman/stack_computers/index.html
1•tosh•6m ago•0 comments

Supreme Court rules most of Trump tariffs illegal

https://www.cbsnews.com/news/supreme-court-tariffs-decision-trump/
1•mhb•6m ago•0 comments

Artisanal Code, AI, and the Right to Repair the Future

https://geekyschmidt.com/post/2026-2-15-artisanal-code/
1•speckx•8m ago•0 comments

U.S. Supreme Court strikes down tariffs

https://www.washingtonpost.com/national-security/2026/02/20/live-updates-supreme-court-tariffs-ru...
6•niuzeta•9m ago•0 comments

Trump's global tariffs struck down by US Supreme Court

https://www.bbc.com/news/live/c0l9r67drg7t
62•blackguardx•11m ago•21 comments

What the Spring Festival robots show about China's technological prowess [video]

https://www.youtube.com/watch?v=gfJTX1Y0ynM
1•vintagedave•11m ago•1 comments

Small numbers of Notepad++ users reporting security woes

https://doublepulsar.com/small-numbers-of-notepad-users-reporting-security-woes-371d7a3fd2d9
3•maxloh•12m ago•1 comments

West Virginia Claims That Apple Allows Sharing of Child Sexual Abuse Material

https://www.nytimes.com/2026/02/19/technology/apple-west-virginia-lawsuit-child-sexual-abuse.html
1•iamnothere•14m ago•0 comments

I Verified My LinkedIn Identity. Here's What I Handed Over

https://thelocalstack.eu/posts/linkedin-identity-verification-privacy/
4•HotGarbage•15m ago•0 comments

HN Mastering Debate 101: Always impact your arguments [video]

https://www.youtube.com/watch?v=uupzEr5O0bI
1•TheAntiEgo•15m ago•1 comments

Trump overstepped executive power by imposing tariffs, Supreme Court rules

https://www.theguardian.com/us-news/2026/feb/20/trump-supreme-court-tariffs-ruling
9•fizl•15m ago•0 comments

17 AI companies that raised $100M or more so far in 2026

https://techcrunch.com/2026/02/17/here-are-the-17-us-based-ai-companies-that-have-raised-100m-or-...
2•gmays•16m ago•0 comments

Cketchbook: Collaborative drawing web app from scratch in C with no dependencies

https://github.com/cedric-h/cketchbook
1•hecanjog•17m ago•0 comments

Ask HN: On-Device vs. Cloud Based LLMs

1•zahirbmirza•18m ago•0 comments

Cothought: A Markdown zettelkasten journal for your life, in Claude Code

https://cothought.ai
1•elliotbnvl•18m ago•1 comments

13h disruption in December after Kiro AI deleted and recreated an environment

https://www.reuters.com/business/retail-consumer/amazons-cloud-unit-hit-by-least-two-outages-invo...
1•r2sk5t•19m ago•0 comments

Learning Resources vs. Trump, President of the United States [pdf]

https://www.supremecourt.gov/opinions/25pdf/24-1287_4gcj.pdf
1•verzali•19m ago•0 comments

Show HN: Decision Guardian – surface architectural context

3•iamalizaidi•19m ago•0 comments

US Supreme Court rejects Trump's global tariffs

https://www.reuters.com/legal/government/us-supreme-court-rejects-trumps-global-tariffs-2026-02-20/
10•eis•20m ago•0 comments

The only taboo left is copyright infringement

https://www.garbageday.email/p/the-only-taboo-left-is-copyright-infringement
1•Tomte•20m ago•0 comments

Build AI Workflows on Amazon EKS with Union.ai and Flyte

https://aws.amazon.com/blogs/machine-learning/build-ai-workflows-on-amazon-eks-with-union-ai-and-...
1•aitacobell•20m ago•0 comments

OpenClaw can book flights. But can it survive a dungeon crawl?

https://bart.degoe.de/ai-agent-dungeon-crawl/
4•bartdegoede•21m ago•0 comments

Show HN: OpenGUI – Desktop GUI for OpenCode with prompt queuing

https://github.com/akemmanuel/OpenGUI
1•akemmanuel•21m ago•0 comments