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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: Ghidora build system, An nx/Bazel alternative

https://ghidora.hyperforge.in
1•StellaMary•37s ago•0 comments

When NASA Told Its Astronauts to Quit Smoking (2014)

https://www.smithsonianmag.com/air-space-magazine/when-nasa-ordered-astronauts-quit-smoking-18095...
1•thunderbong•1m ago•0 comments

What's in a name? Dogs or wolves, painted or wild

https://africageographic.com/stories/whats-name-dogs-wolves-painted-wild/
1•altilunium•2m ago•0 comments

New Lithium-Plasma Engine Passes Key Mars Propulsion Test

https://www.universetoday.com/articles/new-lithium-plasma-engine-passes-key-mars-propulsion-test
1•rbanffy•3m ago•0 comments

Chinese Courts Rule Companies Cannot Fire Workers Simply to Replace Them with AI

https://www.caixinglobal.com/2026-04-30/chinese-courts-rule-companies-cannot-fire-workers-simply-...
2•virgildotcodes•9m ago•0 comments

The Rotary Un-Smartphone

https://skysedge.com/telecom/RUSP/index.html
2•tzury•13m ago•0 comments

Gremlin

https://en.wikipedia.org/wiki/Gremlin
2•jumploops•13m ago•0 comments

The Ethiopian Running Secret

https://aeon.co/essays/what-ethiopian-running-says-about-the-limits-of-human-ability
2•rifish•16m ago•0 comments

Learning my lesson that Python virtual environments aren't always movable

https://utcc.utoronto.ca/~cks/space/blog/python/VenvsNotEntirelyMovable
1•ingve•18m ago•0 comments

Raspberry Pi: A Foundation Model in Your Pocket – Colossus

https://colossus.com/article/raspberry-pi-eben-upton/
1•rbanffy•21m ago•0 comments

Meta Just Killed Open-Source AI

https://www.utkarshapoorva.com/writing/meta-llama-trap/
1•utkarsh_apoorva•24m ago•0 comments

RexIDE now has minimal "integration" with Codex App [video]

https://www.youtube.com/watch?v=K3j8ydsLfWs
1•tomerbd•28m ago•0 comments

Xmemory: Benchmarking Structured AI Memory Against RAG and Hybrid RAG

https://arxiv.org/abs/2604.27906
1•alex_petrov•36m ago•0 comments

Ukraine Overtakes US, 6 EU Countries in Press Freedom Index

https://kyivindependent.com/ukraine-overtakes-united-states-on-press-freedom/
2•dgellow•41m ago•0 comments

Advanced Quantization Algorithm for LLMs

https://github.com/intel/auto-round
1•lastdong•42m ago•0 comments

From Taxman to VATmiraal: Fifty Years of Teaching Machines the Law

https://vatmiraal.be/blog/from-taxman-to-vatmiraal
1•triska•43m ago•1 comments

Show HN: A minimal snippet sharing service with API, CLI, and web front end

https://github.com/skorotkiewicz/snip
1•modinfo•43m ago•0 comments

Meta Launches USDC Creator Payouts on Solana and Polygon via Stripe

https://stablecoinbrief.substack.com/p/meta-launches-usdc-creator-payouts
3•knivef•44m ago•0 comments

A TypeScript Implementation of FastCGI

https://github.com/Swatto/node-fastcgi
1•swatt0•44m ago•0 comments

CapEx ≥ Revenue Visibility:The new bar the market just set

https://twitter.com/oswarld_oz/status/2050080691694850328
2•haebom•45m ago•0 comments

SystemD is of out of control. The Best Minimal, Modern, Linux alternative

https://grigio.org/systemd-is-of-out-of-control-the-best-minimal-modern-and-modular-linux-alterna...
3•grigio•47m ago•3 comments

Ubuntu is going all in on Generative AI and other Linux distros might follow

https://www.neowin.net/news/ubuntu-is-going-all-in-on-generative-ai-and-other-linux-distros-might...
2•bundie•52m ago•0 comments

AI and decomp project used to port Super Smash Bros to PC

https://github.com/JRickey/BattleShip
1•tnelsond4•54m ago•0 comments

Bouncy – A small Rust web scraper with built-in MCP support

https://github.com/maziarzamani/bouncy
1•mazzamani•54m ago•0 comments

AI will dissolve human civilization as we know it

https://www.newstatesman.com/culture/books/book-of-the-day/2026/04/ai-will-dissolve-human-autonomy
2•thinkingemote•58m ago•0 comments

Employers are blindsiding candidates with AI interviews–and scaring them off

https://www.fastcompany.com/91534397/employers-are-blindsiding-candidates-with-ai-interviews-and-...
2•geox•1h ago•0 comments

Price of Free Gmail

https://www.forbes.com/sites/zakdoffman/2026/04/28/price-of-free-gmail-how-much-your-google-accou...
3•nreece•1h ago•0 comments

96.8% of MCP tool descriptions don't warn the agent about destructive behaviour

https://policylayer.com/research/state-of-mcp-2026
4•liad•1h ago•0 comments

Signs of early life in post asteroid impact sites

https://www.nature.com/articles/s43247-026-03206-7
3•albertgoeswoof•1h ago•0 comments

Is `cal` broken? What happened in September 1752?

https://unix.stackexchange.com/questions/17903/is-cal-broken-what-happened-in-september-1752
2•vismit2000•1h ago•1 comments