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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Google shows small models analyze smartphone screens to predict what users want

https://research.google/blog/small-models-big-results-achieving-superior-intent-extraction-throug...
1•rexbee•2m ago•0 comments

The Uncomfortable Math of Working for Yourself

https://thomasunise.com/the-uncomfortable-math-of-working-for-yourself/
1•eeko_systems•5m ago•0 comments

A Massacre in Mashhad

https://www.newyorker.com/news/as-told-to/a-massacre-in-mashhad
1•petethomas•5m ago•0 comments

What Margaret Atwood Would Like You to Know

https://newrepublic.com/article/204118/margaret-atwood-like-know-book-lives-memoir-review
1•petethomas•6m ago•1 comments

Lilliputian Hallucinations

https://www.sciencedirect.com/science/article/pii/S0149763421001068
1•rammy1234•8m ago•0 comments

Show HN: gRPC Transport for HashiCorp/Raft

https://github.com/dhiaayachi/raft-grpc-transport
1•neo2006•10m ago•0 comments

Tesla launches robotaxi rides in Austin with no human safety driver

https://techcrunch.com/2026/01/22/tesla-launches-robotaxi-rides-in-austin-with-no-human-safety-dr...
1•lateforwork•11m ago•0 comments

Slonk: Slurm on Kubernetes for ML Research at Character.ai

https://blog.character.ai/slonk/
1•gmays•14m ago•0 comments

Curl shutters bug bounty program to remove incentive for submitting AI slop

https://www.theregister.com/2026/01/21/curl_ends_bug_bounty/
1•botanicals6•15m ago•1 comments

Human OS for AI

https://humanreadiness.org
1•cp248•16m ago•0 comments

Hotels Are Getting Rid of Proper Bathroom Doors and Guests Are Revolting

https://www.wsj.com/lifestyle/travel/hotels-bathroom-no-doors-8cb4bf96
1•Geekette•17m ago•2 comments

I Don't Want Your Business Card

https://benhouston3d.com/blog/I-dont-want-your-business-card
1•bhouston•21m ago•1 comments

The Internet Is Dead

https://anihil.com/the-internet-is-dead
1•anihil•23m ago•0 comments

Starting a Startup at 25, 35, or 45 Is Not the Same Decision

https://nauma.ai/blog/p/starting-a-startup-at-25-35-or-45/
2•alx_sukhanov•24m ago•0 comments

Asking Grok to delete fake nudes may force victims to sue in Musk's chosen court

https://arstechnica.com/tech-policy/2026/01/asking-grok-to-delete-fake-nudes-may-force-victims-to...
3•uprooted•25m ago•0 comments

ChatGPT Is a Dead-End

https://garymarcus.substack.com/p/breaking-sir-demis-hassabis-becomes
1•mandeepj•27m ago•0 comments

U.S. Formally Withdraws from World Health Organization

https://www.nytimes.com/2026/01/22/us/politics/united-states-withdraws-world-health-organization....
37•reaperducer•32m ago•13 comments

Never Pay for Online Dating

https://web.archive.org/web/20100821041938/http://blog.okcupid.com/index.php/why-you-should-never...
3•sogen•34m ago•2 comments

America's next big critical minerals source could be coal mine pollution

https://theconversation.com/americas-next-big-critical-minerals-source-could-be-coal-mine-polluti...
1•PaulHoule•36m ago•0 comments

Exposed: Investigative journalism on radiation exposure during air travel

https://www.scrippsnews.com/scripps-news-investigates/exposed
1•DrZootron•37m ago•0 comments

What if the reason we can't find Dark Matter is simply because it doesn't exist?

https://zenodo.org/records/17911993
2•emsti•39m ago•1 comments

Purchase by Bending Spoons (Harvest App)

https://old.reddit.com/r/HarvestApp/comments/1q25xpy/purchase_by_bending_spoons/
1•mikhael•40m ago•0 comments

Trump threatens pollsters after New York Times survey shows sagging disapproval

https://www.politico.com/news/2026/01/22/trump-poll-nyt-approval-00740786
8•SilverElfin•41m ago•2 comments

Clj-pack – Package Clojure apps into self-contained binaries without GraalVM

https://github.com/avelino/clj-pack
1•avelino•42m ago•1 comments

Not all Chess960 positions are equally complex

https://arxiv.org/abs/2512.14319
1•MaysonL•42m ago•0 comments

Signal's Censorship Circumvention is susceptible to AiTM attacks

https://www.reversemode.com/2026/01/signals-censorship-circumvention-is.html
2•cyb0rg0•43m ago•1 comments

Bugs Apple Loves

https://www.bugsappleloves.com
147•nhod•45m ago•41 comments

Shamash is a powerful JVM architecture enforcement tool for teams

https://github.com/aalsanie/shamash
1•aalsanie•46m ago•1 comments

How Space Manufacturing Could Be Revolutionary – Scott Manley

https://www.youtube.com/watch?v=U1sH2a57eXM
1•connorboyle•47m ago•0 comments

Tailscale and BlueBubbles makes an iMessage on Windows and Android less complex

https://tailscale.com/blog/bluebubbles-tailscale-imessage-android-pc-no-port-forwarding
1•ryanhn•48m ago•0 comments