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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/

Conflict Resolution

https://en.wikipedia.org/wiki/Conflict_resolution
1•nill0•2m ago•0 comments

Grandmother says staged arrest for reality TV show left her injured

https://www.cnn.com/2026/07/25/us/grandmother-arrest-police-reality-show
1•Tomte•3m ago•0 comments

Presearch Has Shut Down

https://news.presearch.io/a-message-from-the-presearch-team-aaa448052b2b
1•paulnpace•3m ago•0 comments

Japanese Lottery Tickets

https://designreviewed.com/50-japanese-lottery-tickets/
1•Michelangelo11•9m ago•0 comments

Show HN: Smriti: Your Photos, Your Memories

https://chivukulavirinchi.github.io/photovault/
1•virinchi_cv•10m ago•0 comments

Games of Incomplete Information(2002) [pdf]

https://web.stanford.edu/~jdlevin/Econ%20203/Bayesian.pdf
1•nill0•11m ago•0 comments

AIs-welcome Lean library downstream of Mathlib

https://github.com/TauCetiProject/TauCeti
1•MADEinPARIS•13m ago•0 comments

Quil – a reboot-proof terminal multiplexer that resumes AI sessions

https://github.com/artyomsv/quil
1•artyomsv•18m ago•0 comments

The math of traffic jams and how to avoid them

https://theconversation.com/dont-change-lanes-the-maths-of-holiday-traffic-jams-287389
1•beardyw•18m ago•0 comments

Jensen Huang's $75M gift to Vanderbilt argues art decides what technology is for

https://fortune.com/2026/07/23/why-did-jensen-huang-donate-75-million-to-art-school-vanderbilt-un...
1•theanonymousone•21m ago•0 comments

Why Would Meta Download So Much Porn?

https://www.theatlantic.com/technology/2026/07/meta-strike-3-porn-lawsuit/688023/
2•hebelehubele•21m ago•1 comments

A New Approach to Nuclear Warhead Verification Using a Zero-Knowledge Protocol(2012) [pdf]

https://www.boazbarak.org/Papers/nuclear-zk.pdf
1•nill0•21m ago•0 comments

Why My Open-Source Project Hasn't Done Better

1•yohji1984•23m ago•0 comments

CP/M-68K and Motorola 68000 Emulator

https://kobolt.github.io/article-264.html
1•AlexeyBrin•23m ago•0 comments

Type checker may be wrong – Lean and the Curry-Howard correspondence

https://max-amb.github.io/blog/your_type_checker_may_be_wrong/
1•max-amb•25m ago•1 comments

Show HN: Cygnus – A fast, lightweight self-hostable serverless runtime and PaaS

https://cygnus.run
2•ccheshirecat•25m ago•0 comments

Personal context data isn't a moat, tacit knowledge is

https://cse.ac/en/jun/hobby-capital/
1•hyeongjun•27m ago•0 comments

Show HN: I made an algorithmic arena game with physics in 3D

https://algohol.net/
2•Vibr•27m ago•0 comments

Git rebase -I is not that scary

https://cachebag.sh/journal/interactive-rebasing/
1•birdculture•29m ago•0 comments

An industrial designer's take on a portfolio tracker

https://stockfly.app
1•khorsus•30m ago•0 comments

Trajectory: A Standard Format for Agent Experience Data

https://www.letta.com/blog/trajectory/
1•wertyk•32m ago•0 comments

Systems and Delays

https://martin.janiczek.cz/2026/07/24/systems-and-delays.html
1•haeseong•33m ago•0 comments

Show HN: Tawrida – Global Trade Export Documents Generator Tool

https://tawrida.xyz/tools
2•Mohamed_zakarya•33m ago•0 comments

What if the RAM/GPU shortage is deliberate?

https://xn--vk5b17r.online/posts/ram-gpu-consp/
1•theoneone•34m ago•1 comments

Copyfarleft

https://wiki.p2pfoundation.net/Copyfarleft
1•Tepix•35m ago•0 comments

Trump announces 2028 presidential bid

https://www.smh.com.au/world/trump-announces-2028-presidential-bid-20260725-p60iho.html
1•wahnfrieden•38m ago•1 comments

Scientist with 1k Patents Fueling a Drug Powerhouse

https://www.wsj.com/health/pharma/regeneron-george-yancopoulos-drug-discovery-17fea3fa
2•bookofjoe•42m ago•1 comments

FrontAlign – A CSS Framework with Semantic Utilities and Vanilla JavaScript

https://frontalign.dev
2•eyruz•50m ago•1 comments

You never have to do work again

https://hiotto.vercel.app/
2•anqer•51m ago•2 comments

How we pushed CDC into Postgres, and turned replication into clockwork

https://www.snowflake.com/en/blog/engineering/postgres-to-snowflake-replication-mirroring/
2•plaur782•57m ago•0 comments