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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/

The MATRIX – 1950's Super Panavision 70 [video]

https://www.youtube.com/watch?v=APZ6ycET5WY&list=PL3chMvVbsupSzQrk-lJBS8cpdIfGDbJfc&index=9
1•Bluestein•1m ago•0 comments

Columbia House, Mail-Order Media Company, Is Shuttering

https://consequence.net/2026/08/columbia-house-closing-down/
1•speckx•2m ago•0 comments

Looking for Cofounder in Legaltech

https://santol.finance
1•bgajjela•2m ago•0 comments

Star Wars: A New Hope – A Visual Guide to Changes in the Disney+ 4K Version

https://thedigitalbits.com/features/articles/item/2144-sw-new-hope-disneyplus-4k-2019
1•dabber•4m ago•0 comments

Why the IBM PCjr Failed: The "Peanut" Disaster Stan Veit Ch. 24 [video]

https://www.youtube.com/watch?v=BBem-H6ZLtY
1•oldnetguy•4m ago•0 comments

Cursor: Chat is all you need

https://twitter.com/mattyp/status/2089758434921160877
1•tosh•4m ago•0 comments

Ideating Tragit

https://figbert.com/posts/ideating-tragit/
1•Bluestein•6m ago•0 comments

macOS Data Protection Keychain for Electron Apps

https://github.com/biw/keychain-store
1•biwills•9m ago•0 comments

Data centers raise nearby temperatures by up to 4 degrees in Phoenix

https://asmedigitalcollection.asme.org/sustainablebuildings/article/7/2/024501/1233035/Data-Cente...
2•cwwc•9m ago•0 comments

AI chip startup Etched doubles valuation to $21B in under a month

https://www.reuters.com/technology/ai-chip-startup-etched-valued-21-billion-latest-funding-round-...
1•porridgeraisin•11m ago•1 comments

How Wall Street Sussed Out That Situational Awareness Was on the Ropes

https://www.wsj.com/finance/investing/how-wall-street-sussed-out-that-situational-awareness-was-o...
1•scrlk•11m ago•1 comments

Take-home pay calculator with real county/city tax data

https://gross.money/
1•greenthumbdrew•11m ago•0 comments

Photoshop: Adding Features You Don't Need Since 1990

https://myadventuresasanillustrator.substack.com/p/photoshop-adding-features-you-dont
1•pavel_lishin•12m ago•0 comments

Screwworm Infections Get Worse, Government Unleashing Drone Army to Surveil Them

https://www.techdirt.com/2026/08/17/screwworm-infections-get-worse-government-unleashing-drone-ar...
1•hn_acker•16m ago•1 comments

You Trust 1000 Strangers Every Time You Deploy

https://daylight.ai/blog/you-trust-1000-strangers-every-time-you-deploy
1•aviramha•16m ago•0 comments

Fyrox Game Engine now supports wgpu

https://github.com/FyroxEngine/Fyrox/pull/927
1•linggen•20m ago•0 comments

NoWreck v0.4.0

https://github.com/AstralXVoid/NoWreck/
1•AstralXVoid•20m ago•0 comments

Can Haskell Become a Great Language for Data Science?

https://www.youtube.com/watch?v=WpDVrUdbT2o
1•linggen•20m ago•0 comments

Reducing target directory size on nightly

https://blog.rust-lang.org/inside-rust/2026/08/18/reducing-target-dir-size-on-nightly/
2•linggen•21m ago•0 comments

One Person State – portable personal AI system

https://embassy.svit.la/p/one-person-state
1•promen_svitla•22m ago•0 comments

Every software company will become a dev tools company

https://thenewstack.io/platform-engineering-ai-harness/
1•tonkkatonka•23m ago•0 comments

And then the men with guns tell you to do it anyway

https://shkspr.mobi/blog/2026/08/and-then-the-men-with-guns-tell-you-to-do-it-anyway/
2•_djo_•23m ago•0 comments

Copia Institute Again Asks Court to Fix Contradictory Media Advertising Ruling

https://www.techdirt.com/2026/08/17/another-california-court-has-now-broken-media-advertising-so-...
1•hn_acker•23m ago•1 comments

Gmail Verified Sender Program eligibility and policies

https://support.google.com/mail/answer/12467704?hl=en
3•ChrisArchitect•23m ago•2 comments

A 24-Year-Old Blew Up a $45B AI Fund

https://rubbishtalk.com/finance/how-a-24-year-old-blew-up-a-45-billion-ai-fund/
1•Mr_Kobayashi•24m ago•0 comments

Poetry Lovers' Page

https://www.poetryloverspage.com/
1•pablode•25m ago•0 comments

Paperless Cloud Backups

https://samsm.ch/paperless-cloud-backups/
1•speckx•26m ago•0 comments

Apple's Camera-Equipped AirPods See Them in Action

https://www.macrumors.com/2026/08/17/camera-equipped-airpods-macos-26-7/
2•_djo_•26m ago•0 comments

Ask HN: How did Openrouter appreciate from –$1.3B to $7B+ in just 82 days?

https://www.axios.com/2026/08/17/stripe-openrouter-paypal
2•gulmothrowaway•26m ago•1 comments

If You Have Users, You Have to Market Your Programming Language

https://c3-lang.org/blog/you_have_to_market_your_programming_language/
1•kugurerdem•28m ago•0 comments