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The Problem That Built an Industry

https://ajitem.com/blog/iron-core-part-1-the-problem-that-built-an-industry/
1•ShaggyHotDog•2m ago•0 comments

LinkedIn Pulse Lost 85% of Its Organic Traffic in the Last Two Years

https://growtika.com/blog/linkedin-pulse-research
1•Growtika•3m ago•0 comments

In Defense of Rediscovery

https://wilsoniumite.com/2026/04/11/in-defense-of-rediscovery/
1•Wilsoniumite•5m ago•0 comments

Framechart – Turn CSV data into animated chart videos

https://framechart.com
1•Don_Data•8m ago•0 comments

Can OpenClaw and Claude be better than therapy?

https://world.hey.com/cassio/openclaw-claude-are-better-than-therapy-e0ac3ad9
2•cacozen•9m ago•1 comments

Show HN: Helix – open-source self-healing back end for production crashes

https://88hours.github.io/helix-community/
1•NomiJ•9m ago•0 comments

Iran War and the great reset with Katherine Austin Fitts [video][1hr]

https://www.youtube.com/watch?v=Y7JdMLITSDU
1•Bender•9m ago•0 comments

America Has a New GLP-1 Playbook

https://www.theatlantic.com/health/2026/04/glp-1-pill-wegovy-weight-loss/686768/
1•01-_-•11m ago•0 comments

Overhead Projector

https://en.wikipedia.org/wiki/Overhead_projector
2•zeristor•11m ago•2 comments

Key Person Quest Launching

https://keyperson.quest
1•Londondannyboy•14m ago•0 comments

Nadir: Open-source LLM router that cuts API costs 30-60% (MIT License)

https://getnadir.com/
2•amirdor•14m ago•0 comments

Show HN: Hands-on course for building RL environments for LLMs

https://github.com/anakin87/llm-rl-environments-lil-course
1•anakin87•16m ago•1 comments

Show HN: Superpowers-UML – UML-Enabled Superpowers

https://github.com/takaakit/superpowers-uml
1•takaakit•16m ago•0 comments

Steam Link Expands to Apple Vision Pro in Beta

https://www.tuaw.com/2026/04/11/steam-link-expands-to-apple-vision-pro-in-beta/
2•zeristor•21m ago•0 comments

United's Unique Hub in the Pacific

http://www.flightsinasia.com/update/article/Uniteds-Unique-Hub-in-the-Pacific/
1•kevmo314•23m ago•0 comments

Show HN: Waffle – Native macOS terminal that auto-tiles sessions into a grid

https://waffle.baby
2•olleeolleeollee•25m ago•0 comments

How do the microplastics in our bodies affect our health?

https://www.bbc.com/future/article/20250723-how-do-the-microplastics-in-our-bodies-affect-our-health
1•strogonoff•25m ago•0 comments

Show HN: The Musical Manifold [pdf]

https://esenbilproductions.replit.app/The_Musical_Manifold.pdf
1•ersinesen•28m ago•0 comments

Compact Compact Language Detector

https://www.andriydruk.com/post/compact-compact-language-detector/
1•andriydruk•31m ago•0 comments

Apollo in Real Time

https://apolloinrealtime.org/11/
1•rvnx•32m ago•0 comments

MySQL 9.7.0 vs. sysbench on a small server

http://smalldatum.blogspot.com/2026/04/mysql-970-vs-sysbench-on-small-server.html
1•gsky•38m ago•0 comments

South Korea introduces universal basic mobile data access

https://www.theregister.com/2026/04/10/south_korea_data_access_universal/
13•saikatsg•38m ago•1 comments

Slides (Hypnotic Video About a Dude's Slides and Slide Projector)

https://www.youtube.com/watch?v=hZhMAtHoU20
1•OhMeadhbh•40m ago•1 comments

Plannex

https://plannex.app/
1•Novakinify•41m ago•0 comments

Spooky-connect4: a Rust/Python library with variable board sizes

https://github.com/snowdrop4/spooky-connect4
1•drw•41m ago•0 comments

Spooky-chess: a Rust/Python library with variable board sizes

https://github.com/snowdrop4/spooky-chess
1•drw•42m ago•0 comments

Bitcoin miners are losing $19,000 on every BTC produced as difficulty drops 7.8%

https://www.coindesk.com/markets/2026/03/22/bitcoin-miners-are-losing-usd19-000-on-every-btc-prod...
50•PaulHoule•43m ago•31 comments

TraceFix – Paste a Linux/SSH log error, get the root cause and exact fix command

https://tracefix.vercel.app/
1•skillsettler•43m ago•0 comments

Cotypist

https://cotypist.app/
1•saikatsg•44m ago•0 comments

Shipped a 66-ticket Architecture Epic autonomously with a new Coding Agent setup

https://widal.substack.com/p/we-shipped-a-66-ticket-architecture
2•niwid•44m ago•0 comments
Open in hackernews

Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/