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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

MIDI Remote Panel for Multi-FX Sony DPS-V77

https://github.com/Tonfisch/Editor-for-Sony-DPS-V77
1•tonfisch•36s ago•0 comments

Wonderland, Incorporated: Marketing the national parks

https://worldhistory.substack.com/p/wonderland-incorporated
1•crescit_eundo•2m ago•0 comments

Show HN: Supabase Testcontainers for Rust

https://github.com/j7nw4r/supabase_testcontainers
2•tmpsterwfwegw•3m ago•0 comments

Show HN: ConceptViz – Generate STEM diagrams for teachers from simple prompts

https://conceptviz.app
1•zane0924•3m ago•0 comments

ChatGPT 3 turned 3 today. It still hasn't come close to meeting expectations

https://garymarcus.substack.com/p/three-years-on-chatgpt-still-isnt
2•garymarcus•5m ago•1 comments

Traveling Neighborhoods

https://supernuclear.substack.com/p/traveling-neighborhoods
1•surprisetalk•5m ago•0 comments

"Yo Mama" Joke

https://en.wikipedia.org/wiki/%22Yo_mama%22_joke
1•surprisetalk•5m ago•0 comments

What Makes an Experiment Beautiful?

https://www.asimov.press/p/beautiful-experiments
1•surprisetalk•5m ago•0 comments

Tinned Fish Frenzy

https://whatsworking.substack.com/p/tinned-fish-frenzy
1•surprisetalk•5m ago•0 comments

First Time Deploying to Production with AI Agents: Testing Cursor on Azure

https://pdub.click/2511308
1•7777777phil•8m ago•0 comments

ChatGPT Turns 3

https://restofworld.org/2025/chatgpt-three-years-global-impact/
1•donohoe•9m ago•0 comments

Cliff Young (Athlete)

https://en.wikipedia.org/wiki/Cliff_Young_(athlete)
2•wallflower•10m ago•0 comments

Show HN: I build a KOReader plugin to control Home Assistant devices

https://github.com/moritz-john/homeassistant.koplugin
1•sputge•11m ago•0 comments

Zillow Removes Climate Risk Scores from Home Listings

https://www.nytimes.com/2025/11/30/climate/zillow-climate-risk-scores-homes.html
2•donohoe•15m ago•0 comments

Web Interface Guidelines from Vercel

https://vercel.com/design/guidelines
1•Brajeshwar•16m ago•0 comments

Sylve: Lightweight GUI for Managing Bhyve, Jails, ZFS, Networking on FreeBSD

https://github.com/AlchemillaHQ/Sylve
1•ksec•16m ago•0 comments

The Overengineering Problem

https://mtende.blog/overengineering-problem
1•sonderotis•16m ago•0 comments

A Modern Renderer for SWT Applications (Without Changing Existing Code)

https://www.equo.dev/blog/swt-evolve
2•Javatasctic•17m ago•0 comments

The Undermining of the CDC

https://www.newyorker.com/magazine/2025/12/08/the-undermining-of-the-cdc
3•bookofjoe•18m ago•1 comments

Show HN: Cloud-agnostic SIEM that uses a natural language query layer

https://github.com/clay-good/mantissa-log
1•hireclay•21m ago•0 comments

Fen's Law of Programming

https://fenomas.com/2025/11/fens-law/
1•tagawa•23m ago•0 comments

The Beatles Anthology Review

https://www.theguardian.com/tv-and-radio/2025/nov/26/the-beatles-anthology-review-incredible-audi...
1•mariuz•23m ago•0 comments

Niri 25.11 released with alt-tab and other improvements

https://github.com/YaLTeR/niri/releases/tag/v25.11
2•WD-42•23m ago•0 comments

How Intelligence Agencies Deanonymized Admins of the "Boystown" Tor Service [video]

https://www.youtube.com/watch?v=Mzz6-mfevfs
1•intunderflow•28m ago•0 comments

A marketplace that kills the hidden ad-waste tax in e-commerce

3•Baqqla•38m ago•0 comments

AlphaFold: Five Years of Impact

https://deepmind.google/blog/alphafold-five-years-of-impact/
2•mariuz•39m ago•0 comments

Women's Rights Are Winning

https://foreignpolicy.com/2025/10/21/women-rights-equality-gender-abortion-populism-right-wing-fe...
2•mooreds•39m ago•0 comments

Geothermal Breakthrough in South Texas Signals New Era for Ercot

https://www.powermag.com/geothermal-breakthrough-in-south-texas-signals-new-era-for-ercot/
7•mooreds•40m ago•0 comments

The most sustainable feedstocks for precision fermentation (2024)

https://worldbiomarketinsights.com/the-most-sustainable-feedstocks-for-precision-fermentation/
1•mooreds•42m ago•0 comments

Merger (Purchase) Agreements Are Too Long

https://corpgov.law.harvard.edu/2025/11/28/merger-agreements-are-too-long/
2•cwwc•45m ago•0 comments