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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

Cloudflare Remote App – Manage Cloudflare, Anywhere

1•cloudflareapp•25s ago•0 comments

Why do output tokens cost 5x more than input tokens?

https://www.anirudhsathiya.com/blog/transformer
1•ani17•48s ago•0 comments

The Neuroscience of Weed

https://psychedelirium.substack.com/p/the-neuroscience-of-weed
1•yenniejun111•1m ago•0 comments

Show HN: Apple style onboarding experience for your Mac app (open-source)

https://github.com/rampatra/TourKit
1•rampatra•3m ago•0 comments

The Melbourne project turning used tennis balls into shoes

https://www.abc.net.au/news/2026-04-13/used-tennis-balls-recycled-shoe-soles/106544162
1•cainxinth•4m ago•0 comments

Adding Hybrid Search to Your Application (In Diagrams)

https://amgix.io/blog/2026/04/07/adding-hybrid-search/
1•kvasserman•6m ago•0 comments

We Could Watch Your Azure SRE Agent in Real Time

https://enclave.ai/blog/anyone-could-watch-your-azure-ai-agents-conversations-in-real-time
1•talhof8•7m ago•0 comments

This Week in Plasma: Per-Screen Virtual Desktops and Wayland Session Restore

https://blogs.kde.org/2026/04/18/this-week-in-plasma-per-screen-virtual-desktops-and-wayland-sess...
1•birdculture•9m ago•0 comments

Show HN: CyberWriter – a .md editor built on Apple's (barely-used) on-device AI

https://cyberwriter.app
1•uncSoft•9m ago•0 comments

AI Consciousness Requires Validated Models of Human Consciousness [pdf]

https://lossfunk.com/papers/ai-consciousness.pdf
2•paraschopra•12m ago•0 comments

Chinese tech workers are starting to train their AI doubles

https://www.technologyreview.com/2026/04/20/1136149/chinese-tech-workers-ai-colleagues/
1•Brajeshwar•13m ago•0 comments

Show HN: Built software to stop private schools from drowning in admin work

https://edunationapp.com/start
1•marjanatanasov•14m ago•0 comments

What Anthropic's Mythos and Project Glasswing Mean for Your Apple Devices

https://tidbits.com/2026/04/09/what-anthropics-mythos-and-project-glasswing-mean-for-your-apple-d...
1•JumpCrisscross•16m ago•0 comments

I don't chain everything in JavaScript anymore

https://allthingssmitty.com/2026/04/20/why-i-dont-chain-everything-in-javascript-anymore/
1•AllThingsSmitty•17m ago•0 comments

The Killer Robots Are Coming. The Battlefield Will Never Look the Same

https://www.nytimes.com/2026/04/20/world/europe/ukraine-russia-war-robots-drones.html
1•JumpCrisscross•18m ago•0 comments

Show HN: Goempy – Ship a CPython interpreter inside your Go binary

https://github.com/tamnd/goempy
1•tamnd•18m ago•0 comments

Car Owners Are Revolting over Tesla's Self-Driving Promises

https://www.wsj.com/business/autos/car-owners-are-revolting-over-teslas-self-driving-promises-b76...
1•JumpCrisscross•19m ago•0 comments

Claude Code sometimes hallucinates user messages

https://www.lesswrong.com/posts/F2jg34PYtwWZMvzme/edward-james-young-s-shortform?commentId=JvQkqc...
2•cubefox•20m ago•1 comments

The New York Times is wrong about the birth rate

https://www.theargumentmag.com/p/the-new-york-times-is-wrong-about
1•RickJWagner•22m ago•0 comments

When Your Digital Life Vanishes

https://www.newyorker.com/magazine/2026/04/27/when-your-digital-life-vanishes
1•littlexsparkee•22m ago•0 comments

5 days No AI. An AI detox challenge

https://zymacs.github.io/post/five-days-no-ai/
1•kernzistor45•23m ago•1 comments

Elon Musk's Mistaken Call for a 'Universal High Income'

https://reason.com/2026/04/17/elon-musks-mistaken-call-for-a-universal-high-income/
1•RickJWagner•23m ago•0 comments

ggsql: A Grammar of Graphics for SQL

https://opensource.posit.co/blog/2026-04-20_ggsql_alpha_release/
6•thomasp85•25m ago•1 comments

Show HN: Free Incident War Rooms for Team Training SRE/DevOps

https://youbrokeprod.com/
1•cdnsteve•25m ago•0 comments

PostmarketOS Conference

https://postmarketos.org/conference/
1•birdculture•26m ago•0 comments

Show HN: Native desktop app for Google Tasks

https://kitetasks.com
1•tocopoco•27m ago•1 comments

Robots beat human records at Beijing half-marathon

https://techcrunch.com/2026/04/19/robots-beat-human-records-at-beijing-half-marathon/
2•Brajeshwar•28m ago•0 comments

Compression is all you need: Modeling Mathematics

https://arxiv.org/abs/2603.20396
1•ggraphilia•29m ago•0 comments

Show HN: Lightflare – Self-hosted AI agent server for teams

https://github.com/shzlw/lightflare
1•yuegui•29m ago•0 comments

Backblaze Account Takeover

https://fyr.io/post/backblaze-account-takeover
1•MD87•29m ago•0 comments