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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/

Stt.ai MCP Server

https://pypi.org/project/sttai-mcp/0.1.0/
1•nadermx•2m ago•0 comments

Consumer routers hacked by Russia's military

https://arstechnica.com/security/2026/04/russias-military-hacks-thousands-of-consumer-routers-to-...
1•pabs3•7m ago•0 comments

What are some unforeseen / elusive edge cases you have seen in your career?

https://www.reddit.com/r/ExperiencedDevs/s/FIQYb1Fg8x
1•rainhacker•11m ago•0 comments

Get Free Picks Everyday. Best Sports Analysis App in Market

https://probaly.net/
1•astrofx•13m ago•0 comments

Show HN: Browse GitHub repos in Emacs without cloning

https://github.com/agzam/remoto.el
2•iLemming•18m ago•1 comments

Maine's governor vetoes data center moratorium

https://techcrunch.com/2026/04/25/maines-governor-vetoes-data-center-moratorium/
1•SilverElfin•22m ago•0 comments

All About USB-C: Resistors and Emarkers (2023)

https://hackaday.com/2023/01/04/all-about-usb-c-resistors-and-emarkers/
1•walterbell•23m ago•0 comments

I asked my local LLM to add 23 numbers and got seven wrong answers

https://viggy28.dev/article/local-llm-seven-wrong-answers/
1•vira28•25m ago•0 comments

Godot 4.7 Beta with HDR Output, Ray-Tracing Improvements and Editor Enhancements

https://www.phoronix.com/news/Godot-4.7-Beta
1•shpat•26m ago•0 comments

White House Correspondents' Dinner shooting suspect worked as California teacher

https://www.cnn.com/2026/04/26/us/white-house-correspondents-dinner-shooter-teacher-invs
3•canucker2016•26m ago•2 comments

Show HN: RewardGuard – detect reward hacking in RL training loops

https://github.com/Giovan321/Reward-Guard
1•Giovan321•27m ago•1 comments

Electric trucks in China have ditched diesel, now they're ditching the driver

https://thedriven.io/2026/04/25/electric-trucks-in-china-have-already-ditched-diesel-now-theyre-d...
2•decimalenough•34m ago•0 comments

Show HN: Track official AI company news and blogs in your Chrome side panel

https://chromewebstore.google.com/detail/bigtech-ai-news/aehmpingbppjnlppejppiifmijdjjiej
1•tughvn•35m ago•1 comments

Ask HN: Is "agentic" coding working for everyone except me?

1•canttestthis•36m ago•2 comments

Maine governor blocks first US state freeze on new data centers

https://www.reuters.com/legal/litigation/maine-governor-rejects-first-us-state-freeze-new-data-ce...
1•rmason•36m ago•0 comments

Show HN: I made a simple bill of sale maker

https://www.makebillofsale.com/
1•atharvtathe•39m ago•0 comments

What the FCC router ban means for FOSS

https://sfconservancy.org/blog/2026/apr/02/fcc-router-ban/
6•pabs3•43m ago•0 comments

MrBeast Is What Marx Warned Us About [video]

https://www.youtube.com/watch?v=-Hv-be_KdE0
6•xbmcuser•43m ago•0 comments

Show HN: I built a Shadcn based alternative to shields.io

https://github.com/jal-co/shieldcn/
1•justinlevine•51m ago•1 comments

iOS 18.7.3-18.7.6 were withheld from most devices; iOS 18.7.7 is enabled for all

https://support.apple.com/en-us/126793
4•seam_carver•52m ago•0 comments

A Home Made PBX

https://wandel.ca/homepage/pbx.html
5•rickcarlino•57m ago•0 comments

Real-time speech-to-speech translation

https://research.google/blog/real-time-speech-to-speech-translation/
1•theorchid•1h ago•0 comments

How much for a fake authorship? Ad database reveals secrets of scientific fraud

https://www.nature.com/articles/d41586-026-01340-y
1•WaitWaitWha•1h ago•0 comments

Spanish archaeologists discover trove of ancient shipwrecks in Bay of Gibraltar

https://www.theguardian.com/science/2026/apr/15/hidden-treasures-spanish-archaeologists-discover-...
2•1659447091•1h ago•0 comments

OpenAI CEO apologizes to Tumbler Ridge community

https://techcrunch.com/2026/04/25/openai-ceo-apologizes-to-tumbler-ridge-community/
1•pseudolus•1h ago•0 comments

A breakthrough in C/C++ dependency management

https://lcamtuf.substack.com/p/a-breakthrough-in-cc-dependency-management
3•nippoo•1h ago•0 comments

EU Age Control: The trojan horse for digital IDs

https://juraj.bednar.io/en/blog-en/2026/04/17/eu-age-control-the-trojan-horse-for-digital-ids/
33•gasull•1h ago•4 comments

How many biological substrates of life?

1•energyscholar•1h ago•2 comments

Dataland, the first museum of AI arts, sets opening date and first exhibition

https://www.latimes.com/entertainment-arts/story/2026-04-23/refik-anadol-ai-art-museum-dataland-o...
1•1659447091•1h ago•0 comments

Etymology of "Foo"

https://www.ietf.org/rfc/rfc3092.txt
2•shawnzam•1h ago•0 comments