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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/

Signal – More linked devices are on the table

https://signal.org/blog/linked-devices-and-android-tablets/
1•seanieb•1m ago•0 comments

One Man's Cure for Loneliness Started a Movement

https://www.wsj.com/us-news/how-one-mans-cure-for-loneliness-started-a-movement-b4d386dd
1•fortran77•1m ago•1 comments

Show HN: It's a Plan – a self-hosted, open-source alternative to Linear

https://github.com/croffasia/itsaplan
1•Croffasia•2m ago•0 comments

SpaceX – Q2 2026 Earnings [pdf]

https://d18rn0p25nwr6d.cloudfront.net/CIK-0001181412/cfe10442-59c3-460b-8a4f-75fa96c69af9.pdf
1•spikels•3m ago•0 comments

Bigger Displays Rumored for Next Year's iPhone Models

https://www.macrumors.com/2026/08/04/bigger-displays-rumored-for-next-year-iphones/
1•Tomte•5m ago•0 comments

Don't Dither

https://sarahconstantin.substack.com/p/dont-dither
1•jger15•6m ago•0 comments

Show HN: Recruiting/interview tool for recs, hiring managers and interviewers

https://toprec.io
1•girish-fokusly•7m ago•0 comments

Bro

https://github.com/dmmulroy/.dotfiles/blob/main/home/.agents/skills/bro/SKILL.md
2•ramoz•8m ago•1 comments

GenOffice – GenSpark's AI native office suite

https://github.com/genspark-ai/genoffice
1•msis•9m ago•0 comments

Wrinkles, an AI app that uncovers the hidden stories of places around you

https://techcrunch.com/2026/08/04/meet-wrinkles-an-ai-app-that-uncovers-the-hidden-stories-of-the...
1•mikelgan•10m ago•1 comments

Atoms: Physical automation to transform industry and move the world

https://atoms.co/
1•stackohlee•11m ago•0 comments

Show HN: Extractor.sh – simple, affordable Firecrawl alternative

https://extractor.sh/
1•mariusbolik•12m ago•0 comments

Hedonic Treadmill (Hedonic Adaptation)

https://en.wikipedia.org/wiki/Hedonic_treadmill
2•consumer451•13m ago•0 comments

Browser Tools SDK is code-mode for the browser

https://libretto.sh/browser-tools
1•tanishqkanc•14m ago•0 comments

Sektron: A MIDI step sequencer in the terminal

https://github.com/emprcl/sektron
1•vegadw•14m ago•0 comments

Employees Like Their A.I. Boss. Its Shop Is Kind of a Disaster

https://www.nytimes.com/2026/08/04/us/ai-boss-san-francisco-andon-market.html
1•jjwiseman•15m ago•0 comments

Mesh-Client: The Universal Desktop Suite for Mesh Networks

https://github.com/Colorado-Mesh/mesh-client
1•vegadw•16m ago•0 comments

Apple Limits Bug Bounty Submissions After Flood of AI Slop

https://www.macrumors.com/2026/08/04/aple-bug-bounty-limits-ai/
1•cdrnsf•16m ago•0 comments

Wasps as an effective pest control for agriculture

https://www.ucl.ac.uk/news/2019/nov/wasps-effective-pest-control-agriculture
1•eatonphil•16m ago•0 comments

How Much Risk Is a Useful Amount of Risk?

https://craigmod.com/roden/116/
2•simonebrunozzi•16m ago•0 comments

Chaldeans Cultural Competency

https://news.jrn.msu.edu/culturalcompetence/race/chaldeans/
1•marysminefnuf•17m ago•0 comments

A More Immediate Intuitive Appeal

https://blog.veitheller.de/intuition.html
1•hellerve•17m ago•0 comments

Signls: A non-linear, generative MIDI sequencer

https://empr.cl/signls/
1•vegadw•17m ago•0 comments

Show HN: Sagorax, a Three.js/WebGPU Arena Shooter in the Browser

https://sagorax.com/
1•AntonioEritas•17m ago•0 comments

Why the Hardest Concept for Python Devs Is Concurrency

https://oedokumaci.com/blog/posts/python-concurrency
1•jicea•18m ago•0 comments

Nearest Pint

https://knowwhereconsulting.co.uk/maps/pubs/
1•bookofjoe•20m ago•0 comments

Leopold Aschenbrenner: Situational Awareness Two Years On

https://philippdubach.com/posts/aschenbrenners-receipts/
1•7777777phil•22m ago•0 comments

Show HN: Maple-Preview – ternary 20B MoE running at 120 tok/s on a iPhone

https://deepgrove.ai/maple-preview
6•edwardbzhang•22m ago•2 comments

Breaking Locks in Gothic 1 Remake

https://erfur.dev/blog/gothic-lockpicking
1•MrFinch•23m ago•0 comments

Introducing Kiro Crew

https://kiro.dev/blog/introducing-kiro-crew/
1•LeTeutz•24m ago•0 comments