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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/

Glyph Protocol for Terminals

https://rapha.land/introducing-glyph-protocol-for-terminals/
1•signa11•1m ago•0 comments

Boston Dynamics and Google DeepMind Teach Spot to Reason

https://spectrum.ieee.org/boston-dynamics-spot-google-deepmind
1•geox•2m ago•0 comments

Real estate investors are buying up long-term care facilities

https://www.npr.org/2026/04/19/nx-s1-5786242/profit-landlord-real-estate-investment-trust-nursing...
1•mikhael•3m ago•0 comments

Can your AI rewrite your code in assembly?

https://lemire.me/blog/2026/04/05/can-your-ai-rewrite-your-code-in-assembly/
1•signa11•3m ago•0 comments

DIDs Are Cool. We Didn't Need Them

https://www.inamoon.com/blog/dids-vs-subjects
1•mankins•5m ago•0 comments

Ask HN: Why is splitting bills still so painful in 2026?

1•allenalux•7m ago•0 comments

The shape of Vision – a cognitive architecture for AI agents

https://iampneuma.com/the-shape-of-vision/
1•barronai•7m ago•1 comments

Robot smashes human record in half-marathon – as another self-destructed

https://newatlas.com/ai-humanoids/robots-outrun-humans-half-marathon/
1•omer_k•11m ago•0 comments

Robots Are Quietly Building the Future of Renewable Energy

https://oilprice.com/Energy/Energy-General/Robots-Are-Quietly-Building-the-Future-of-Renewable-En...
1•thelastgallon•35m ago•0 comments

OSS agents that kill idle cloud clusters before they eat your budget

https://github.com/CruiseAI/digitaltap-oss
2•digitaltap•42m ago•0 comments

Luanjo

1•luanjo•42m ago•0 comments

AI is about to make the global e-waste crisis worse

https://restofworld.org/2026/global-ewaste-crisis/
3•i7l•45m ago•1 comments

Show HN: Lfk – a yazi inspired, Vim-like keyboard focused fast Kubernetes TUI

https://github.com/janosmiko/lfk
1•mixe3y•46m ago•0 comments

Washington DC on track for most volatile temperature year since 1959

https://www.williamangel.net/blog/2026/04/19/Washington_DC_On_Track_For_Stormy_2026.html
1•datadrivenangel•47m ago•0 comments

Theseus, a Static Windows Emulator

https://neugierig.org/software/blog/2026/04/theseus.html
1•zdw•47m ago•0 comments

Choice Against Cost: Sparse Autoencoder Findings in Three Small Language Models

https://substack.com/home/post/p-194758516
3•sourdoughbob•47m ago•0 comments

SoK: Security of Autonomous LLM Agents in Agentic Commerce

https://arxiv.org/abs/2604.15367
3•omer_k•51m ago•0 comments

Avoiding a Culture of Emergencies

https://blog.staysaasy.com/p/avoiding-a-culture-of-emergencies
1•walterbell•52m ago•0 comments

Debate grows over memory semiconductor bonuses

https://koreajoongangdaily.joins.com/news/2026-04-20/opinion/columns/Debate-grows-over-semiconduc...
1•walterbell•1h ago•1 comments

Brussels pushes remote working to ease energy crisis

https://www.ft.com/content/bbc9c31e-cc43-41a6-8fb7-057d44b25a21
4•petethomas•1h ago•0 comments

They Went Abroad to Save Money. Moving Back Seems Unaffordable

https://www.nytimes.com/2026/04/19/business/americans-abroad-cheaper-living-costs.html
2•toomanyrichies•1h ago•0 comments

Tinkerer transforms a filthy 1990s PlayStation into the 'ultimate PS1'

https://www.popsci.com/technology/transform-1990s-playstation/
1•Brajeshwar•1h ago•0 comments

The Infinite Machine Olto is part motorcycle, part bike, part Cybertruck

https://www.theverge.com/transportation/913008/infinite-machine-olto-ebike-review
1•walterbell•1h ago•0 comments

Show HN: OpenRegistry – MCP for global company registry search

https://github.com/sophymarine/openregistry
1•richardwong1•1h ago•0 comments

A cache-friendly IPv6 LPM with AVX-512 (linearized B+-tree, real BGP benchmarks)

https://github.com/esutcu/planb-lpm
4•debugga•1h ago•0 comments

Introductory Biology: Evolutionary and Ecological Perspectives

https://pressbooks.umn.edu/introbio/
2•rolph•1h ago•0 comments

Is AI pressure making developer burnout worse? (anonymous survey inside)

2•rechargedaily•1h ago•2 comments

WebUSB Extension for Firefox

https://github.com/ArcaneNibble/awawausb
3•luu•1h ago•0 comments

Autonomous Testing and AI‑Driven Tooling Are Redefining Developer Productivity

https://semanticed.online/editorial-why-autonomous-testing-and-ai-driven-tooling-are-redefining
2•alihassaanmug•1h ago•0 comments

Qwen releases Qwen3-Embedding-0.6B

https://huggingface.co/Qwen/Qwen3-Embedding-0.6B
4•arabicalories•1h ago•2 comments