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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/

Yearslong fight over users' right to tweak smart TV software heads to trial

https://arstechnica.com/gadgets/2026/05/inside-the-fight-to-force-vizio-to-share-linux-based-sour...
1•pabs3•1m ago•0 comments

SpaceX's historic IPO plans: Billions in losses and Musk's ownership

https://www.cnbc.com/2026/05/20/spacex-ipo-live-updates.html
1•1vuio0pswjnm7•5m ago•0 comments

Déjà moo: cows can recognise the faces of people they know

https://www.thetimes.com/uk/science/article/cattle-ability-recall-human-faces-ttn6v0nns
2•petethomas•7m ago•0 comments

BoE Governor says Plans to limit food prices 'not sustainable'

https://www.thetimes.com/business/economics/article/m-and-s-boss-attacks-preposterous-food-price-...
1•petethomas•9m ago•0 comments

I 100% vibecoded a webgame that makes money

https://gunguesser.com
1•abhahbnar•14m ago•0 comments

Musk's SpaceX Reveals Its Finances for the First Time

https://www.nytimes.com/2026/05/20/technology/elon-musk-spacex-ipo.html
2•1vuio0pswjnm7•14m ago•1 comments

Show HN: SkinMax – AI Skin Care Coach

https://howolddoyoulook.com/app
1•beast200•14m ago•0 comments

Anthropic says it's about to have its first profitable quarter

https://techcrunch.com/2026/05/20/anthropic-says-its-about-to-have-its-first-profitable-quarter/
1•nl•18m ago•1 comments

Jeff Bezos says bottom half of earners should pay zero in income taxes

https://www.cnbc.com/2026/05/20/jeff-bezos-income-taxes.html
1•khutorni•20m ago•1 comments

OpenAI Stargate: where the US sites stand

https://epoch.ai/blog/openai-stargate-where-the-us-sites-stand
2•nl•22m ago•0 comments

Meta Begins Laying Off Employees as It Transforms Around AI

https://www.wsj.com/tech/ai/meta-begins-laying-off-thousands-of-employees-as-it-transforms-around...
3•1vuio0pswjnm7•22m ago•0 comments

Wispr Flow Is Broken

https://old.reddit.com/r/WisprFlow/comments/1thejf4/wisprflow_what_is_going_on/
1•ayushchat•23m ago•0 comments

Put yourself in a loop with your coding agents

https://github.com/AsteroidHunter/expediter
2•AsteroidHunter•23m ago•2 comments

Dumbshit.app

https://dumbshit.app
2•robsch•23m ago•0 comments

DiffsHub

https://diffshub.com/
2•tosh•25m ago•0 comments

PR Diff Speed Matters

https://twitter.com/mitchellh/status/2057229385963618787
2•tosh•26m ago•0 comments

[RFC] Open Access to Standards Documents – LLVM Project

https://discourse.llvm.org/t/rfc-open-access-to-standards-documents/90856
1•matt_d•26m ago•0 comments

Show HN: FKS2G – LLM-backed metrics for deciding how closely to review code

https://github.com/kmdupr33/fks2g
1•kmdupree•28m ago•0 comments

The Unreasonable Effectiveness of HTML

https://claude.com/blog/using-claude-code-the-unreasonable-effectiveness-of-html
1•galsapir•31m ago•1 comments

Sparrow compliance check for Linux configs

https://github.com/melezhik/Sparrow6/blob/master/documentation/taskchecks.md
1•melezhik•33m ago•1 comments

A Practical Guide to Profiling in Go

https://blog.jetbrains.com/go/2026/05/20/golang-profiling-guide/
3•signa11•42m ago•0 comments

Curly braces: An evolution of UNIX and C

https://thalia.dev/blog/unix-braces/
2•matt_d•43m ago•0 comments

Deterministic ad engine that refuses to lie – verified with SQL

https://alloceraintelligence.com/
1•allo1•44m ago•1 comments

The Sound of Cancer

https://twitter.com/Elise__Jenkins/status/2056938362548756561
1•pppone•47m ago•0 comments

Technology usually creates jobs for young, skilled workers. Will AI do the same?

https://news.mit.edu/2026/technology-creates-jobs-young-skilled-workers-ai-0521
2•SVI•48m ago•2 comments

Dirplot

https://deeplook.github.io/dirplot/
3•jonbaer•48m ago•0 comments

NanoTag: Systems Support for Efficient Byte-Granular Overflow Detection on Arm

https://github.com/ice-rlab/NanoTag
1•matt_d•50m ago•0 comments

Zed Terminal Threads

https://zed.dev/blog/terminal-threads
3•_august•52m ago•0 comments

He Lost It at the Movies

https://www.theideasletter.org/essay/he-lost-it-at-the-movies/
1•tintinnabula•54m ago•0 comments

Microsoft's LinkedIn Is Cutting Jobs in Latest Industry Cull

https://www.bloomberg.com/news/articles/2026-05-13/microsoft-s-linkedin-is-cutting-jobs-in-latest...
1•1vuio0pswjnm7•54m ago•0 comments