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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

Why can't anyone show us the study showing vaccines save lives?

https://kirschsubstack.com/p/why-cant-anyone-show-us-the-study
1•willhschmid•48s ago•1 comments

Our Moon Is Curiously Lopsided, and an Impact Could Be to Blame

https://www.sciencealert.com/our-moon-is-curiously-lopsided-and-a-massive-impact-could-be-to-blame
1•gmays•3m ago•0 comments

What is GraphQL and how does it compare to REST for API design

https://www.designgurus.io/answers/detail/what-is-graphql-and-how-does-it-compare-to-rest-for-api...
1•teleforce•6m ago•0 comments

Show HN: Detect changes and keep data in sync with meter's web scraper

https://www.meter.sh/
1•hankwilliamsjr•6m ago•0 comments

AI taught me to be a better human

https://billmei.net/blog/ai-companions
1•Kortaggio•7m ago•0 comments

Tariffs: Why Oxford students are more protectionist than their professors

https://www.lowyinstitute.org/the-interpreter/tariffs-why-oxford-students-are-more-protectionist-...
1•alephnerd•11m ago•0 comments

Let Apple's offline translation framework translation be your translation engine

https://github.com/novvoo/TranslatorProxy
2•almaight•12m ago•0 comments

Encrypt Your .env in a Meme

https://github.com/thoughtlesslabs/memevault
1•thoughtlesslabs•20m ago•1 comments

Communication as a Product

https://ashgaikwad.substack.com/p/communication-as-a-product
3•ashgkwd•21m ago•0 comments

Key US Power Grid [PJM] Cuts Demand Outlook on Overstated AI Boom

https://www.bloomberg.com/news/articles/2026-01-14/biggest-us-power-grid-cuts-demand-outlook-on-o...
3•toomuchtodo•23m ago•0 comments

Social media time does not increase teenagers' mental health problems – study

https://www.theguardian.com/media/2026/jan/14/social-media-time-does-not-increase-teenagers-menta...
1•sien•26m ago•1 comments

The Inelastic Markets Hypothesis [pdf]

https://r.jordan.im/download/investing/gabaix2020.pdf
1•luu•31m ago•0 comments

The Single-Click Microsoft Copilot Attack That Silently Steals Personal Data

https://www.varonis.com/blog/reprompt
3•extesy•36m ago•0 comments

DeepSeek's technical papers show frontier innovation

https://www.scmp.com/tech/tech-trends/article/3339769/deepseek-stays-mum-next-ai-model-release-te...
2•nsoonhui•41m ago•0 comments

"Don't worry. Boys are hard to find." Trump/Epstein and... Criminal Enterprises

https://lisevoldeng.substack.com/p/dont-worry-boys-are-hard-to-find
6•Tadpole9181•41m ago•1 comments

We built a browser with GPT-5.2 in Cursor

https://xcancel.com/mntruell/status/2011562190286045552?s=20
2•aaraujo002•43m ago•0 comments

Show HN: Commosta – marketplace to share computing resources

https://www.commosta.io/
2•gkm25•43m ago•0 comments

JSON Render

https://json-render.dev/
1•handfuloflight•45m ago•0 comments

Show HN: IMSAI/Altair inspired microcomputer with web emulator

https://gzalo.github.io/microcomputer/
1•gzalo•46m ago•0 comments

Skillshare: Sync skills to all your AI CLI tools with one command

https://github.com/runkids/skillshare
1•handfuloflight•52m ago•0 comments

Show HN: Chklst – A Minimalist Checklist

https://www.chklst.xyz/
2•rgbjoy•55m ago•0 comments

Opinion: Why tech leaders can't regulate AI before releasing them?

1•lauraorchid•55m ago•2 comments

Vibe Coding Paradox

https://blog.kaplich.me/vibe-coding-paradox/
2•skaplich•56m ago•0 comments

Show HN: I built a satellite forensic engine to detect fraud in Carbon Markets

1•kccanarch•56m ago•1 comments

Google is shutting down the Tenor API

https://www.reddit.com/r/webdev/s/ZjlFO8kiW4
1•kull•56m ago•2 comments

Bubblewrap: A nimble way to prevent agents from accessing your .env files

https://patrickmccanna.net/a-better-way-to-limit-claude-code-and-other-coding-agents-access-to-se...
5•0o_MrPatrick_o0•58m ago•0 comments

Is passive investment inflating a stockmarket bubble?

https://www.economist.com/finance-and-economics/2026/01/14/is-passive-investment-inflating-a-stoc...
25•andsoitis•59m ago•43 comments

I beat Factorio on 1k Floppy disks [video]

https://www.youtube.com/watch?v=cTPBGZcTRqo
1•simonpure•59m ago•1 comments

ISS astronauts return to Earth early due to illness of crew member

https://www.cbc.ca/news/science/nasa-crew11-early-return-9.7045315?cmp=rss
2•gnabgib•1h ago•0 comments

2025 Berggruen Prize Essay Competition Winners

https://berggruen.org/eu/news/2025-berggruen-prize-essay-competition-winners
2•i7l•1h ago•0 comments