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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/

Triumph of the Nerds (1 of 3) 4K Upscaled [video]

https://www.youtube.com/watch?v=ACt6xsMt5Uk
1•evo_9•36s ago•0 comments

Trump's crypto venture and Iran's top exchange tapped the same industry networks

https://www.reuters.com/investigations/how-trumps-crypto-venture-irans-top-exchange-tapped-into-s...
1•JumpCrisscross•1m ago•0 comments

Ask HN: How can you have fun doing corporate dev work in the age of AI tools?

1•uejfiweun•1m ago•0 comments

M-26-14: Agency Logging and Network Visibility Against Cyber Threats [pdf]

https://www.whitehouse.gov/wp-content/uploads/2026/05/M-26-14-Ensuring-Effective-and-Efficient-Ag...
1•882542F3884314B•1m ago•0 comments

The Download: online safety's future and climate tech's big pivot

https://www.technologyreview.com/2026/05/21/1137733/the-download-online-safety-climate-tech-pivot/
1•joozio•2m ago•0 comments

Personality Series: Agreeableness and Extraversion

https://www.byarcadia.org/post/personality-101-agreeableness-and-extraversion
1•poly2it•3m ago•0 comments

Drug overdose deaths drop sharply in the U.S. even as new street drugs emerge

https://www.npr.org/2026/04/12/nx-s1-5776933/drug-overdose-deaths-drop-sharply-in-the-u-s-even-as...
1•brandonb•4m ago•0 comments

AI Mistakes Are Infuriating Gamers as Developers Seek Savings

https://www.bloomberg.com/news/articles/2026-02-25/ai-mistakes-are-infuriating-gamers-as-develope...
2•evo_9•5m ago•0 comments

Permitting reform: Washington's elusive bipartisan dream

https://www.politico.com/news/2026/05/23/permitting-reform-congress-elusive-00934630
1•JumpCrisscross•6m ago•0 comments

I've been documenting roadside memorials and capturing them in an app I built

https://roamo.me
1•monocat•7m ago•0 comments

The Motorola 68060 and Chip Design: Interview with Lead Designer Joe CI [video]

https://www.youtube.com/watch?v=1takr2k7Yfo
1•cyrc•8m ago•0 comments

Writing for Humans and Machines

https://hiba.fyi/essays/writing-for-humans-and-machines
1•haxzie•10m ago•0 comments

China Eliminates Tariffs on Africa to Outmaneuver U.S.

https://www.wsj.com/world/africa/china-africa-tariffs-664f62eb
1•JumpCrisscross•11m ago•0 comments

Couple of Emacs Hacks (2003)

https://web.archive.org/web/20160303225220/http://osdir.com/ml/lisp.cmucl.devel/2003-08/msg00302....
1•susam•11m ago•0 comments

Assertables v10: Rust crate for assert test macros on Codeberg & GitHub & GitLab

https://github.com/assertables/assertables-rust-crate
1•jph•12m ago•0 comments

ExtendDB: An open source DynamoDB-compatible adapter with pluggable storage

https://aws.amazon.com/blogs/database/introducing-extenddb-an-open-source-dynamodb-compatible-ada...
2•shenli3514•12m ago•0 comments

Announcement: We've Updated the Rules, and April Is Finally Over

https://old.reddit.com/r/programming/comments/1tlh5aj/announcement_weve_updated_the_rules_and_apr...
1•birdculture•12m ago•0 comments

Decision Precision

https://allenc.com/decision-precision/
1•allenc•12m ago•0 comments

Building a Search Engine from Scratch – 1

https://unconventionalthinker.vercel.app/builiding_a_search_engine_part1.html
2•unconventional•13m ago•0 comments

Reality has a surprising amount of detail (2017)

http://johnsalvatier.org/blog/2017/reality-has-a-surprising-amount-of-detail
1•downbad_•14m ago•0 comments

Poor's Man Opaque Types

https://lungarellaraffaele.dev/writings/brand-types/
1•lung42•17m ago•0 comments

C as an Intermediate Language (2012)

https://yosefk.com/blog/c-as-an-intermediate-language.html
1•downbad_•17m ago•0 comments

Childhood and Education #19: Letting Kids Be Kids #2

https://thezvi.substack.com/p/childhood-and-education-19-letting
1•paulpauper•18m ago•0 comments

Stable Code from Stable Problems

https://ieeexplore.ieee.org/document/11527162
1•gfairbanks•18m ago•1 comments

'The vibes are young male vibes': Why prediction markets attract a certain type

https://www.bbc.com/news/articles/c93xv27kpwxo
1•paulpauper•22m ago•0 comments

From Open Source Software to Open Source Strategy

https://p3institute.substack.com/p/from-open-source-software-to-open
1•momentmaker•23m ago•0 comments

Google Is Paving a New Information Superhighway

https://warnercrocker.com/2026/05/23/google-is-paving-a-new-information-superhighway/
1•cdrnsf•25m ago•0 comments

Monthly News – May 2026

https://blog.linuxmint.com/?p=5025
1•paulnpace•25m ago•0 comments

Why are Flathub downloads so slow sometimes?

https://barthalion.blog/flathub-internals-cdn-and-deltas/
1•speckx•25m ago•0 comments

Soupault: A static website management tool

https://soupault.net/
1•Tomte•25m ago•0 comments