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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•12mo ago

Comments

trane_project•12mo 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/

Engineers vs. Psychiatrists (C. P. Snow)

https://unintendedconsequenc.es/engineers-vs-psychiatrists-c-p-snow/
1•paulorlando•2m ago•0 comments

The Mythical App Store Reviewer Month

https://lapcatsoftware.com/articles/2026/5/4.html
1•zdw•6m ago•0 comments

Ask HN: How to increase depth instead of breadth as 10 yoe as swe?

1•Cheesebh•8m ago•0 comments

Tell HN: Stop building software for people, build it for agents instead

1•keepamovin•9m ago•0 comments

Supply Chain Attack Targets Laravel-Lang Packages with Credential Stealer

https://www.aikido.dev/blog/supply-chain-attack-targets-laravel-lang-packages-with-credential-ste...
1•nullbio•14m ago•1 comments

Deepsec: The security harness for finding vulnerabilities in your codebase

https://vercel.com/blog/introducing-deepsec-find-and-fix-vulnerabilities-in-your-code-base
1•882542F3884314B•20m ago•0 comments

Perplexity Bumblebee: Read-Only Tool for Dev Supply Chain Checks on macOS/Linux

https://github.com/perplexityai/bumblebee
1•882542F3884314B•22m ago•0 comments

Show HN: ThinkLLM, A knowledge graph of AI models (HTTPS://thinkllm.dev)

https://thinkllm.dev
1•gkanellopoulos•23m ago•0 comments

All Model Labs Are Now Agent Labs

https://www.latent.space/p/ainews-all-model-labs-are-now-agent
1•swyx•24m ago•0 comments

Zero-dependency CLI that converts LinkedIn exports into Markdown for LLMs

https://linkedin2md.daza.ar/
1•juanmanueldaza•26m ago•0 comments

Show HN: Waiting for AI Grand Prix racing SIM? Me too So I made one

https://github.com/elodin-sys/ai-grand-prix
3•danAtElodin•27m ago•0 comments

The SpaceX IPO filing is filled with AI bets, Starship dreams

https://techcrunch.com/2026/05/20/the-spacex-ipo-filing-ai-bets-starship-dreams-elon-musk/
1•dotcoma•28m ago•0 comments

The analog computer museum's online library

https://www.analogmuseum.org/english/library.html
1•nill0•45m ago•0 comments

Being oncall taught me everything

https://yaoyue.org/blog/2026-oncall/
1•RyeCombinator•49m ago•1 comments

Product Launches, Tools and Builder Guides

https://nicklaunches.com/
2•theorchid•51m ago•3 comments

Google Is Killing ChromeOS: Aluminium OS, Its Android-Based Replacement

https://techjournal.org/google-aluminium-os-replacing-chromeos
16•pabs3•58m ago•3 comments

The Making of Indian Statistics

https://altermag.com/articles/the-making-of-indian-statistics
2•trojanalert•1h ago•0 comments

Microsoft reports AI is more expensive than paying human employees

https://fortune.com/2026/05/22/microsoft-ai-cost-problem-tokens-agents/
71•nreece•1h ago•19 comments

Most EVM systems have no memory

https://blog.bridgexapi.io/most-evm-systems-have-no-memory
2•Bridgexapi•1h ago•1 comments

Agent Substrate

https://github.com/agent-substrate/substrate
1•ahmedtd•1h ago•0 comments

Comparisons as Predictable as the Sunrise

https://pudding.cool/2026/05/similes/
1•newtwentysix•1h ago•0 comments

What Is an Air Gap?

https://www.ibm.com/think/topics/air-gap
1•teleforce•1h ago•0 comments

Ask HN: How concerned are you about a debt crisis?

6•bhag2066•1h ago•2 comments

Laravel Lang Compromised with RCE Backdoor Across 700 Versions

https://socket.dev/blog/laravel-lang-compromise
2•gpi•1h ago•0 comments

New kind of dark tourism emerging in online 'Backrooms,' study shows

https://phys.org/news/2026-05-kind-dark-tourism-emerging-online.html
1•WaitWaitWha•1h ago•0 comments

How the Library of Congress is using both AI and volunteers to unlock history

https://www.nextgov.com/artificial-intelligence/2026/05/how-library-congress-using-both-ai-and-vo...
1•WaitWaitWha•1h ago•0 comments

The Verification Tree: Turning AI bug report floods into a confidence signal

https://zenodo.org/records/20349904
2•yellow_glovez•1h ago•0 comments

Thousands evacuated in Garden Grove worry toxic chemicals in tank could explode

https://ktla.com/news/orange-county/thousands-evacuated-again-after-toxic-tank-leak-in-garden-grove/
2•Bender•1h ago•1 comments

Systemd 261-Rc1 Released with OS Installer, IMDS Subsystem and New Storagectl

https://www.phoronix.com/news/systemd-261-rc1
1•Bender•1h ago•0 comments

Feds unwittingly leak pilots' pre-crash conversation

https://www.theregister.com/science/2026/05/23/feds-unwittingly-leak-pilots-pre-crash-conversatio...
2•Bender•1h ago•0 comments