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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/

Show HN: Hacker News but as Tweets

https://hackernews-reader.pages.dev/
1•ashu1461•1m ago•0 comments

The Amazon SES alternative for developers – MailKite

https://mailkite.dev/blog/amazon-ses-alternative/
1•bucabay•1m ago•0 comments

Show HN: Ultracodex – Run Claude Ultracode Dynamic Workflows with Codex Agents

https://github.com/YuanpingSong/ultracodex
1•yuansong•1m ago•0 comments

Learning to Replicate Expert Judgment in Financial Tasks

https://thinkingmachines.ai/news/learning-to-replicate-expert-judgment-in-financial-tasks/
1•skogstokig•3m ago•0 comments

Markets are competitive if and only if P = NP

https://arxiv.org/abs/2602.20415
2•kscarlet•5m ago•0 comments

Lymphatic Drainage Drops Reviews – Lymph Tonic 2026

https://gamma.app/embed/Lymphatic-Drainage-Drops-Reviews-Lymph-Tonic-2026-ihz5j5zkq876p5m?mode=doc
1•prepostseo•5m ago•0 comments

Economists Are Sounding the Alarm on AI

https://www.wsj.com/tech/ai/the-worlds-top-economists-are-sounding-the-alarm-on-ai-d99055b6
4•cdrnsf•5m ago•1 comments

The Protein Data Layer for AlphaFold-Style Models

https://github.com/mooreneural/HelixDB
1•ramen0w0•9m ago•0 comments

Anthropic wants to develop its own drugs

https://theguptalog.blogspot.com/2026/07/anthropic-wants-to-develop-its-own-drugs.html
3•guptalog•9m ago•1 comments

CurXecute: When a Slack message rewrites your editor's config and runs code

https://medium.com/@Koukyosyumei/curxecute-when-a-slack-message-rewrites-your-editors-config-and-...
1•syumei•11m ago•0 comments

Show HN: Qwilfight – A Pokémon-themed Battleship-like game

https://qwilfight.sepia.top
1•simjnd•12m ago•0 comments

Tibetan man dies after setting himself on fire outside UN in New York

https://www.theguardian.com/world/2026/jul/03/tibet-china-man-tibetan-flag-set-himself-on-fire-di...
2•toilet•13m ago•0 comments

Claude, please stop trying to memorize random crap

https://12gramsofcarbon.com/p/agentics-memorizing-session-transcripts
1•theahura•13m ago•0 comments

Show HN: Daily vibe-coding video games, day 81: World Domination

https://gamevibe.us/81-world-domination
1•pzxc•15m ago•0 comments

Initial Reaction to "The Future of Software Development" TWSoftwareDev26

https://blog.herlein.com/post/retreat-observations/
2•gherlein•19m ago•0 comments

Show HN: I got tired of messy PDF bank statements, so I built a RAM-only parser

https://banktoledger.com
2•Jithu247•20m ago•0 comments

Beyond Horizon analysis: Planet Labs – persistent friction

https://beyondhorizonforesight.substack.com/p/beyond-horizon-analysis-planet-labs
2•beyondhorizonfs•21m ago•0 comments

Testing Claude Sonnet 5's agentic claims

https://developer.puter.com/blog/claude-sonnet-5-puter-js/
2•reynaldi•24m ago•1 comments

How to Survive 3 Years in North Korea as a Foreigner

https://mydiplomaticlife.com/how-to-survive-3-years-in-north-korea-as-a-foreigner/
3•chipndale•26m ago•2 comments

A First Course in Causal Inference

https://arxiv.org/abs/2305.18793
2•Anon84•29m ago•0 comments

Why Major Tech Companies Are Investing in Video Streaming Architecture

https://www.forbes.com/councils/forbestechcouncil/2026/07/02/the-real-reason-major-tech-companies...
2•mondainx•31m ago•0 comments

Costco Is the Anti-Amazon

https://phenomenalworld.org/analysis/the-anti-amazon/
3•bookofjoe•31m ago•1 comments

The Inside Story Of Leverage Research 1.0

https://lydialaurenson.substack.com/p/the-inside-story-of-leverage-research
2•bluepeter•31m ago•0 comments

Factories Are Just Rooms

https://interconnected.org/home/2026/07/03/factories
2•arbesman•33m ago•0 comments

Agentic Symphony: Multi-Agent Collaboration for Emergent Musical Composition

https://www.youtube.com/watch?v=QMUXoImgTIA
2•dennisjoseph•33m ago•0 comments

PrivAiTe: Self-hosted proxy that redacts PII from LLM calls, incl. tool-calls

https://github.com/crp4222/PrivAiTe
2•crp4222•34m ago•0 comments

Another Side Project

https://myprolink.info/
2•mr_betamax•35m ago•0 comments

What we learned building a multi-agent PDF table extractor

https://unstract.com/blog/multi-agent-pdf-table-extraction/
2•naren87•36m ago•0 comments

America, 1926: What a Forgotten 100-Year-Old Report Says About Who We Are

https://www.derekthompson.org/p/america-1926-an-absurdly-deep-dive
2•momentmaker•37m ago•0 comments

Why are we still uploading PDFs just to compress them?

https://lumli.io/blog/pdf-compression-cloud-subscription-2026
2•lumli•39m ago•0 comments