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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Txtbrd

https://txtbrd.com
1•1o1o1o1o1•30s ago•0 comments

Perfect Squares and Pythagorean Triples on the Ulam Spiral

https://www.youtube.com/watch?v=x4ooQSrdz6g
1•nyc111•3m ago•0 comments

Possible identification of the Luna 9 Moon landing site

https://www.nature.com/articles/s44453-025-00020-x
1•geox•4m ago•0 comments

We allowed remote code execution (but safely)

https://tumuchdata.club/post/coding-challenge-infrastructure/
1•todsacerdoti•4m ago•0 comments

Sovereign Code from the Heart of Suffering: Injecting Logic into AI

Https://paragraph.com/@0x4fd3729a4fedf54a74b73d93f7f775a1ef520cec/sovereign-logic-injection-how-t...
1•suffering•4m ago•1 comments

Resurrected nitrogenases recapitulate N-isotope biosignatures over 2B years

https://pmc.ncbi.nlm.nih.gov/articles/PMC9755046/
1•PaulHoule•4m ago•0 comments

Where will China get its compute in 2026?

https://www.the-substrate.net/p/where-will-china-get-its-compute
1•erwald•4m ago•0 comments

Show HN: Superposition, open source access to Claude Code or Codex from anywhere

https://github.com/trezm/superposition
1•trezm•5m ago•0 comments

The EU moves to kill infinite scrolling

https://www.politico.eu/article/tiktok-meta-facebook-instagram-brussels-kill-infinite-scrolling/
3•danso•6m ago•0 comments

No Here on Slack

https://noathere.org/
1•jcmuller•8m ago•0 comments

Humans as Constancy Anchors: A Response to 'Something Big Is Happening'

2•mrev2•10m ago•0 comments

Show HN: ARA-Engine – Modeling the Alberta power grid transition in Python

https://github.com/ada33934/ARA-Engine
1•ada33934•10m ago•0 comments

The AI hater's guide to code with LLMs

https://aredridel.dinhe.net/2026/02/12/the-ai-haters-guide-to-code-with-llms/
3•speckx•13m ago•0 comments

Show HN: An MCP server that gives AI assistants a live Mermaid diagram canvas

https://github.com/iishyfishyy/mermaid-live-mcp
1•ishyfishyy•14m ago•0 comments

Ask HN: Are there examples of 3D printing data onto physical surfaces?

1•catapart•15m ago•0 comments

Fair Weather

https://fair-weather.query-farm.services
2•rustyconover•16m ago•1 comments

OpenAI GPT-5.3-Codex-Spark Now Running at 1K Tokens per Second on Cerebras Chips

https://www.servethehome.com/openai-gpt-5-3-codex-spark-now-running-at-1k-tokens-per-secondon-big...
1•rbanffy•16m ago•0 comments

Mars and Life

https://twitter.com/nasamars/status/2022001374154854471
1•paulpauper•17m ago•0 comments

Oracle vs. PostgreSQL – Row level and Column level security

https://hexacluster.ai/blog/row-level-and-column-level-security-oracle-vs-postgresql
1•avivallssa•17m ago•0 comments

Apple faces new tensions with Trump administration

https://www.ft.com/content/0c25de53-4668-4ddf-9e28-f8c4fc34940e
2•ksec•18m ago•1 comments

Japan's National Chip Startup Races to 2nm Mass Production

https://www.ai-supremacy.com/p/japans-national-chip-startup-races-2nm-rapidus
1•rbanffy•18m ago•0 comments

Show HN: Moatifi – Free Buffett-style moat analysis for stocks

https://moatifi.com
1•lldougl•18m ago•1 comments

What Happened with Bio Anchors?

https://www.astralcodexten.com/p/what-happened-with-bio-anchors
2•paulpauper•18m ago•0 comments

Strawmen and Worldview Solipsism

https://cognitivewonderland.substack.com/p/strawmen-and-worldview-solipsism
1•paulpauper•19m ago•0 comments

Generalized On-Policy Distillation with Reward Extrapolation

https://arxiv.org/abs/2602.12125
1•fzliu•20m ago•0 comments

NIMBYs Complained About Me to the State Bar. The State Bar Told Them to Get Lost

https://inpractice.yimbyaction.org/p/nimbys-complained-about-me-to-the
1•luckyducky99•20m ago•0 comments

Commerzbank Joins European Payment App Wero

https://www.marketscreener.com/news/commerzbank-joins-european-payment-app-wero-ce7e5adddd8bff21
1•toomuchtodo•23m ago•1 comments

Show HN: Tide Commander – Visual Agents Orchestrator for Claude Code and Codex

https://github.com/deivid11/tide-commander
1•deivid11•23m ago•0 comments

Molly Guard in Reverse

https://unsung.aresluna.org/molly-guard-in-reverse/
1•CharlesW•24m ago•0 comments

Virginia court allows Democrats' redistricting vote in plan to counter to Trump

https://www.npr.org/2026/02/13/nx-s1-5711630/virginia-court-allows-democrats-redistricting-vote-i...
1•rbanffy•24m ago•0 comments