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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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: A font that auto-translates Chinese

https://bryanhu.com/chinese-font/
1•thatxliner•6s ago•0 comments

suckmore.org – Software that sucks more

https://suckmore.org/
1•basilikum•2m ago•0 comments

Why do language models feel worse even as benchmarks improve? [pdf]

https://huggingface.co/datasets/realitydriftproject/semantic-fidelity-framework/blob/main/SFL-02_...
1•scaledsystems•5m ago•0 comments

LoRa

https://en.wikipedia.org/wiki/LoRa
1•downboots•5m ago•0 comments

Cursor in talks to raise $2B round at valuation of over $50B

https://www.cnbc.com/2026/04/19/cursor-ai-2-billion-funding-round.html
1•tcp_handshaker•5m ago•1 comments

Vim_gym

https://www.vimgym.app/
1•platzhirsch•7m ago•0 comments

Ukraine Has Given Up on Trump

https://www.theatlantic.com/ideas/2026/04/ukraine-trump-us-oil-russia/686854/
5•Bondi_Blue•9m ago•1 comments

Hunting a 34 year old pointer bug in EtherSlip (DOS Networking)

https://www.brutman.com/Adventures_In_Code/EtherSlip_ARP/EtherSlip_ARP.html
1•mbbrutman•9m ago•0 comments

CEOs admit AI had no impact on employment or productivity

https://fortune.com/article/why-do-thousands-of-ceos-believe-ai-not-having-impact-productivity-em...
4•tcp_handshaker•10m ago•0 comments

What early exponential growth can't tell us about runaway processes

1•jamespropp•10m ago•0 comments

Chinese carmaker Seres granted patent for voice-controlled in-car toilet

https://www.drivencarguide.co.nz/news/chinese-carmaker-seres-granted-patent-for-voice-controlled-...
3•billybuckwheat•14m ago•0 comments

Why your AI assistant is suddenly selling to you

https://www.economist.com/business/2026/04/19/why-your-ai-assistant-is-suddenly-selling-to-you
2•vinni2•14m ago•0 comments

Show HN: Auxx.ai – Customer Support CRM (Mix of Attio and N8n)

https://auxx.ai
2•m4rkuskk•17m ago•0 comments

WordPress Security Checklist: 15 Checks That Matter (and 12 That Don't)

https://novaheaven.io/en/novapulse/wordpress-security-checklist-that-matters
1•SephX•25m ago•0 comments

Oasis EXtensible Access Control Markup Language TC FAQ

https://www.oasis-open.org/committees/xacml/faq.php
1•stmw•26m ago•0 comments

AI Agent Traps

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6372438
2•baxtr•27m ago•0 comments

Show HN: Agentjail – Self Hosted Freestyle.sh

https://github.com/bugthesystem/agentjail
1•ziyasal•27m ago•0 comments

Humanoid robot beats human world record in half marathon

https://thenextweb.com/news/humanoid-robot-half-marathon-beijing-world-record
1•hochmartinez•28m ago•1 comments

Apollo 11 code open-sourced by NASA – Command Module and Lunar Module code repos

https://www.tomshardware.com/software/original-apollo-11-code-open-sourced-by-nasa-original-comma...
3•gnabgib•28m ago•2 comments

Chat with any live MCP server iMessage style

https://dialtoneapp.com/top-sites/www.visioforge.com/mcp
2•fcpguru•30m ago•1 comments

Anti-Amyloid Antibodies for Alzheimer: You Already Know

https://www.science.org/content/blog-post/anti-amyloid-antibodies-alzheimer-you-already-know
3•merksittich•32m ago•0 comments

The Ancient Weapons Active in Your Immune System Today

https://www.quantamagazine.org/the-ancient-weapons-active-in-your-immune-system-today-20260415/
3•tzury•33m ago•0 comments

Show HN: Nyx – multi-turn, adaptive, offensive testing harness for AI agents

https://fabraix.com
12•zachdotai•34m ago•4 comments

Psxsplash – Build PlayStation 1 Games in Unity

https://psxsplash.github.io/
2•spicyjpeg•35m ago•0 comments

Show HN: Dewobble – Filter out phantom clicks and mouse jitter

https://github.com/skorotkiewicz/dewobble
2•modinfo•36m ago•0 comments

AI's New Training Data: Your Old Work Slacks and Emails

https://www.forbes.com/sites/annatong/2026/04/16/ais-new-training-data-your-old-work-slacks-and-e...
1•gnabgib•36m ago•0 comments

Independent bookstores make quiet comeback as big chains dominate retail

https://www.theguardian.com/business/2026/apr/19/independent-bookstores-comeback
1•mykowebhn•47m ago•0 comments

Why every security awareness training has false positives

https://kindssecurity.com/blog/why-every-phishing-simulator-has-false-positives-except-one
2•paulwalkerSEC•49m ago•0 comments

Duolingo's CEO Backtracks Due to Backlash Over Performance Reviews

https://www.entrepreneur.com/business-news/duolingos-ceo-changing-how-he-measures-employee-perfor...
2•gpi•49m ago•0 comments

Show HN: Qapir – Generate API tests automatically from docs

https://app.qapir.io/
2•gradnichkovski•52m ago•1 comments