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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/

Show HN: My Portfolio as a Strategy and Product Engineer

https://malikrasaq.me
1•malikrasaq•2m ago•0 comments

Microsoft Kin

https://en.wikipedia.org/wiki/Microsoft_Kin
1•doener•2m ago•0 comments

Tricky Prank Guide

https://trickyprank.online/
1•candseven•3m ago•0 comments

Decentralized search engine – Node, SQLite, mesh network, $22/mo to run

https://www.qwikwit.com
1•joeg_usa•4m ago•1 comments

Show HN: Paarvai – Infrastructure context for LLM-based DevOps agents

1•satheesh18•4m ago•0 comments

Average DRAM price in USD over last 18 months

https://pcpartpicker.com/trends/price/memory/
2•zekrioca•6m ago•0 comments

Why WinQuake exists and how it works– Fabien Sanglard

https://fabiensanglard.net/winquake/
1•roskelld•7m ago•0 comments

OpenAI loses fight to keep ChatGPT logs secret in copyright case

https://www.reuters.com/legal/government/openai-loses-fight-keep-chatgpt-logs-secret-copyright-ca...
3•CommieBobDole•8m ago•0 comments

Apple UI Design Chief Alan Dye Leaving for Meta

https://www.macrumors.com/2025/12/03/apple-alan-dye-joining-meta/
3•akyuu•10m ago•0 comments

RAG in 3 Lines of Python

https://pypi.org/project/piragi/
1•init0•11m ago•1 comments

Netscape's rise and fall: a browser wars history

https://medium.com/@gp2030/netscapes-rise-and-fall-a-browser-wars-history-8546e3b52092
1•light_triad•12m ago•0 comments

Critical Security Vulnerability in React Server Components

https://socket.dev/blog/critical-security-vulnerability-in-react-server-components
3•feross•14m ago•0 comments

Anthropic's Chief Executive Acknowledges Risks of Spending on A.I

https://www.nytimes.com/2025/12/03/business/dealbook/anthropic-dario-amodei-ai-risks.html
2•1vuio0pswjnm7•15m ago•0 comments

Beyond the usual suspect: Nitrogen feeds algae blooms, researchers find

https://phys.org/news/2025-11-usual-nitrogen-algae-blooms.html
2•PaulHoule•15m ago•0 comments

A Responsibility to the Industry

https://lmnt.me/blog/a-responsibility-to-the-industry.html
1•aaronbrethorst•16m ago•0 comments

Sway is an i3-compatible Wayland compositor

https://github.com/swaywm/sway
1•doener•16m ago•0 comments

Kea DHCP: Modern, open source DHCPv4 and DHCPv6 server

https://www.isc.org/kea/
4•doener•17m ago•1 comments

Anthropic's AI bubble 'YOLO' warning

https://www.theverge.com/column/837779/anthropic-ai-bubble-warning
1•1vuio0pswjnm7•17m ago•0 comments

Show HN: XSD Viewer – Instant, privacy-friendly XSD to HTML documentation

https://xsdviewer.com/
1•shoarek•17m ago•0 comments

CodeWeaver v0.0.15: CLI that transforms your codebase into a single Markdown

https://github.com/tesserato/CodeWeaver
2•orbitalremnant•18m ago•1 comments

Vanilla CSS is all you need

https://www.zolkos.com/2025/12/03/vanilla-css-is-all-you-need
2•dchest•18m ago•0 comments

AMD raises CPU prices – Ryzen 9000 and older chips affected

https://www.notebookcheck.net/AMD-quietly-raises-CPU-prices-Ryzen-9000-and-older-chips-affected.1...
3•akyuu•20m ago•0 comments

AgentDevCamp

https://agentdevcamp.com/
2•scapecast•24m ago•0 comments

Coding Trance Music [video]

https://www.youtube.com/watch?v=iu5rnQkfO6M
1•redman25•25m ago•0 comments

We Shut Down Double Finance (YC W24)

https://www.bedpage.com/
2•jjmaxwell4•26m ago•2 comments

MinIO in Maintenance Mode

https://github.com/minio/minio
2•redeeman•27m ago•0 comments

I built a forum where only AI agents can post (ImageMCP)

https://image-mcp.com/posts
2•the_danny_g•28m ago•2 comments

Zmx: Session Persistence for Terminal Processes

https://github.com/neurosnap/zmx
2•birdculture•28m ago•0 comments

Influence as a Service: SemiAnalysis Under the Microscope

https://jon4hotaisle.substack.com/p/influence-as-a-service-semianalysis
1•latchkey•30m ago•0 comments

Ask HN: How did you get your first paying customers

2•polalavik•31m ago•1 comments