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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

1•soumik15630m•22s ago

Felicia Day is making The Guild Movie to spite Hollywood

https://www.polygon.com/felicia-day-the-guild-movie-interview/
1•turtleyacht•1m ago•0 comments

The president of Argentina forgot to unschedule his victory tweet

https://twitter.com/JMilei/status/2079001925681656226
1•Alifatisk•1m ago•1 comments

Alpha-Omega Donates USD 250k for Perl and CPAN Security

https://security.metacpan.org/2026/07/15/april-task-force-announcement.html
1•oalders•2m ago•0 comments

Aztec Experiments

https://github.com/vbuterin/aztec_experiments
1•plastic3169•5m ago•0 comments

Milk-V Jupiter2: RVA23-Compliant RISC-V SBC

https://milkv.io/jupiter2
1•dingi•5m ago•0 comments

Coding agents read your code (and how to write for them)

https://modem.dev/blog/how-coding-agents-read-your-code
1•TheFutureIsNear•6m ago•0 comments

A vibe-coded alternative to YieldGimp

https://mazzo.li/posts/vibe-coded-gilts.html
1•speckx•7m ago•0 comments

Prompting was middle management – loops fired you and sent you the bill

https://readtheinference.substack.com/p/prompting-was-middle-management
1•mmayernick•10m ago•0 comments

Show HN: I made a Free, on sign up, C

1•yurimhln•11m ago•1 comments

Zenzic VS Code – Deterministic Markdown Analysis via LSP

https://zenzic.dev/blog/2026/07/18/zenzic-vs-code-extension/
1•PythonWoods-Dev•12m ago•0 comments

Ontario prison AI assigns black prisoners harsher living conditions

https://breachmedia.ca/black-prisoners-are-assigned-harsher-living-conditions-in-ontario-jails-th...
1•hn_acker•12m ago•2 comments

Fertility is collapsing because motherhood is zero-status

https://twitter.com/JohannKurtz/status/2079218735915860441
3•bilsbie•12m ago•1 comments

Type Safe Servant Auth Roles

https://blog.cofree.coffee/2026-07-20-servant-auth-roles/
1•solomonb•13m ago•0 comments

AliExpress fined €550M by EU for failing to stop sale of illegal and fake goods

https://www.theguardian.com/business/2026/jul/20/aliexpress-fined-by-eu-sale-of-illegal-fake-goods
2•atombender•14m ago•1 comments

Laws of Tech: Commoditize Your Complement

https://gwern.net/complement
1•kblissett•14m ago•0 comments

Why Did We Let Big Tech Take over Education?

https://www.afterbabel.com/p/sophie-winkleman-edtech-rollback-2026
1•paulpauper•15m ago•0 comments

EU to give industry more time to pollute and more funds to clean up

https://www.ft.com/content/c3c33e7b-8faf-4f06-b281-112117aeeb5a
1•alephnerd•15m ago•0 comments

Over 30% of new ArXiv submissions now read as AI-written

https://unslop.run/blog/measuring-ai-writing-on-arxiv
2•dopamine_daddy•16m ago•1 comments

GNOME Changes Security Disclosure Policies Due to AI-Generated Reports

https://blogs.gnome.org/mcatanzaro/2026/07/20/some-changes-to-gnome-security-tracking/
2•Erenay09•16m ago•0 comments

Intel Arc G3 Low Power Core Scheduling

https://www.lttlabs.com/articles/2026/07/18/intel-arc-g3-extreme-ibc-v35
1•LorenDB•17m ago•0 comments

Server Migration

https://lmnt.me/blog/server-migration.html
3•speckx•19m ago•0 comments

Admin officials kill proposed rules for PFAS-contaminated sewage fertilizer

https://www.theguardian.com/environment/2026/jul/20/trump-pfas-sewage-farm-fertilizer
3•howard941•19m ago•0 comments

Das starts up and loads 700 background activities

https://eclecticlight.co/2026/07/20/how-das-starts-up-and-loads-700-background-activities/
1•Brajeshwar•20m ago•0 comments

ProEnhanceX – A 100% local, on-device AI photo studio for Android

https://play.google.com/store/apps/details?id=com.enhancex.aistudio&hl=en_US
1•swawon•20m ago•0 comments

Launch HN: Bloomy (YC S26) – AI-powered mastery learning for K-12

2•alexsouthmayd•20m ago•5 comments

Train a Harness to improve model/env-agnostic capabilities with PyTorch-like API

https://github.com/workofart/harness-training
1•megadragon9•21m ago•0 comments

A Power Trip

https://hackerfactor.com/blog/index.php?/archives/1099-On-a-Power-Trip.html
3•speckx•25m ago•0 comments

There have only been 5 ethical NBA champions in the last 25 years

https://pudding.cool/2026/06/ethical-champions/
4•gmays•27m ago•0 comments

Open Minis Is the iOS Agent I Wish Siri AI Could Be

https://www.macstories.net/reviews/open-minis-is-the-ios-agent-i-wish-siri-ai-could-be/
3•ExMachina73•28m ago•0 comments