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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

Shares in Allbirds surge after maker of wool sneakers announces pivot to AI

https://www.theguardian.com/business/2026/apr/15/allbirds-stock-ai-pivot
1•i7l•2m ago•0 comments

Tirith – Track your AI API spend with one CLI import

https://github.com/joedaviesio/tirith
1•joedaviesio•2m ago•0 comments

Show HN: The RUM Conjecture Explained [video]

https://www.youtube.com/watch?v=DGoI6T3SGfY
2•rcron•4m ago•0 comments

Amazon worker dies on warehouse floor. Workers told to keep going

https://finance.yahoo.com/sectors/healthcare/articles/just-dont-look-amazon-worker-170000180.html
2•latexr•4m ago•1 comments

YouTube now lets you turn off Shorts

https://www.theverge.com/streaming/912898/youtube-shorts-feed-limit-zero-minutes
1•pentagrama•5m ago•0 comments

Ants Find Food (2003)

https://mute-net.sourceforge.net/howAnts.shtml
1•downbad_•7m ago•3 comments

Substrate Independent

https://github.com/Technologicat/substrate-independent
1•skeledrew•8m ago•0 comments

Zappa: An AI Powered Mitmproxy

https://geohot.github.io//blog/jekyll/update/2026/04/15/zappa-mitmproxy.html
2•__cayenne__•8m ago•0 comments

Anthropic: Stop Shipping. Seriously.

https://www.reddit.com/r/ClaudeAI/s/C9WM4DHtqt
1•IndignantTyrant•11m ago•0 comments

The TL;DR on MCP: Why context matters and how to put it to work

https://www.figma.com/blog/the-tldr-on-mcp/
2•salkahfi•11m ago•0 comments

TruffleRuby 34: Ruby 3.4 Compatibility, 23% Faster Parsing, New 20x Faster

https://truffleruby.dev/blog/truffleruby-34-is-released
1•birdculture•12m ago•0 comments

Atlassian defends firing engineer for suggesting CEO is 'rich jerk'

https://www.afr.com/technology/atlassian-defends-firing-engineer-for-suggesting-ceo-is-rich-jerk-...
7•jamesfinlayson•16m ago•1 comments

Docker Hodgepodge Images

https://www.chainguard.dev/unchained/docker-hodgepodge-images
2•prdonahue•22m ago•0 comments

Bonafide.Work a platform for contractors to launch a website, manage bookings

https://bonafide.work/
1•fullstacking•23m ago•0 comments

Elegant D

https://www.youtube.com/watch?v=-kYM7ue7pqc
1•MikeShah•23m ago•1 comments

Switch: Faster, smarter AI audio conversion

https://www.nch.com.au/pad/switch.xml
1•NCHSoftware•26m ago•0 comments

Nginx 1.30.0

https://github.com/nginx/nginx/releases/tag/release-1.30.0
3•thunderbong•27m ago•0 comments

Come scegliere un developer freelance Laravel per il tuo progetto

https://donatodelpeschio.it/blog/come-scegliere-developer-freelance-laravel
1•donnyBlanko•28m ago•0 comments

For quantum computing, different qubits are better together

https://www.darpa.mil/news/2026/quantum-computing-different-qubits-better-together
1•bookofjoe•29m ago•0 comments

Gay Talese on a Writer's Life

https://www.realclearpolitics.com/articles/2026/04/15/gay_talese_on_a_writers_life_154037.html
2•RickJWagner•32m ago•0 comments

Repos.. 2M+ scanned.. most Google OAuth implementations key on email not sub

https://neelagiri65.github.io/gmail-oauth-research/
1•Srinathprasanna•38m ago•0 comments

Google shoehorned Rust into Pixel 10 modem to make legacy code safer

https://arstechnica.com/gadgets/2026/04/google-shoehorned-rust-into-pixel-10-modem-to-make-legacy...
7•snackoverflow•38m ago•0 comments

Amud 7, the Neanderthal baby who shows they developed faster than modern humans

https://english.elpais.com/science-tech/2026-04-15/amud-7-the-neanderthal-baby-who-shows-they-dev...
2•c420•39m ago•0 comments

How to crawl a quarter billion webpages in 40 hours (2012)

https://michaelnielsen.org/ddi/how-to-crawl-a-quarter-billion-webpages-in-40-hours/
3•downbad_•39m ago•1 comments

Why Can't Programmers Be More Like Ants? (2015)

https://blog.ubiquity.acm.org/why-cant-programmers-be-more-like-ants-or-a-lesson-in-stigmergy/
2•downbad_•42m ago•3 comments

AllSpice – Customer Experience Engineer – San Francisco, CA (Or Remote)

https://www.allspice.io/careers
1•Ewald_Thomas•42m ago•1 comments

PGDumpCloud – Stream PGDump Backups Directly to S3 Compatible Storage Object

https://github.com/CITGuru/pgdumpcloud
2•citguru•43m ago•1 comments

Jury finds Live Nation and Ticketmaster operated as a monopoly, overcharged fans

https://www.cnn.com/2026/04/15/politics/ticketmaster-live-nation-monopoly-verdict
2•pseudolus•44m ago•0 comments

Show HN: Mini-Mythos- A Crowdsourced Mythos Harness copy for Vulnerability Scans

https://github.com/256thFission/mini-mythos
1•ThePhillipLin•45m ago•0 comments

Windsurf 2.0: Introducing the Agent Command Center and Devin in Windsurf

https://windsurf.com/changelog/windsurf-next
1•qainsights•47m ago•1 comments