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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

Practical Electronics Course

https://practicingelectronics.com/practical-electronics-course/
2•ofrzeta•14m ago•1 comments

Humanoid Robot Actuators: The Complete Engineering Guide

https://www.firgelli.com/pages/humanoid-robot-actuators
2•ofrzeta•19m ago•0 comments

IPv4 Tools – IP Lookup, PTR Search, CIDR, ASN

https://worldip.io/tools
1•tuxxin•21m ago•0 comments

Show HN: Maxcred – app to maximise your credit card rewards

https://maxcred.vercel.app
1•theoo21•24m ago•0 comments

BrowserQuest – Mozilla's HTML5 MMO is back

https://korben.info/browserquest-mmo-mozilla-html5-retour.html
3•threejin•24m ago•1 comments

I Automate Everything

https://effective-programmer.com/how-i-actually-automate-everything-0d97ed624a34?sk=f8a15ad7e32cd...
1•naveed125•29m ago•1 comments

StartupLaunchPage – One Page 1500 Fixed Boxes Checkbox Puzzle Game

https://startuplaunchpage.com
1•vnyarongi•31m ago•0 comments

Show HN: TTSC – TypeScript-Go compiler and runner with transform plugins

https://github.com/samchon/ttsc
1•autobe•35m ago•0 comments

Entrepreneurs Flocked to Colorado. Now Red Tape Is Driving Some Away

https://www.wsj.com/business/entrepreneurs-flocked-to-colorado-now-red-tape-is-driving-some-away-...
2•bookmtn•36m ago•2 comments

Real Linux in a Browser Tab

https://linuxontab.com/
1•kilian-ai•37m ago•0 comments

The Scooter and the Bike

https://maxmautner.com/2026/04/12/scooter-vs-bike.html
1•mslate•54m ago•0 comments

HyperList: A powerful TUI for creating, editing, and managing HyperLists

https://github.com/isene/hyperlist
2•thunderbong•57m ago•0 comments

LegalEase – plain-English incorporation guidance for Canadian founders

https://legalease.dev/legalease.dev/
1•margikoca•1h ago•0 comments

The Tech Stack in 2026 (pic)

https://i.imgur.com/w8Ziffp.jpeg
2•ivewonyoung•1h ago•0 comments

Spirit Airlines shuts down; says it can't keep up with higher oil prices

https://apnews.com/article/spirit-airlines-trump-bailout-bankruptcy-37a4818e1b71c0905d022f669d85948c
2•ZeidJ•1h ago•1 comments

Big Tech cut 80k jobs, blamed AI; experts say firms are overstaffed 25%-75%

https://finance.yahoo.com/sectors/technology/articles/big-tech-cut-80-000-211500038.html
1•ZeidJ•1h ago•1 comments

Show HN: Sync agent skills across devices, projects or teams

https://privateaiskills.com/
1•arewethereyeta•1h ago•0 comments

Cozy.Talk – Old web inspired discussion community

https://cozy.talk/
2•rickcarlino•1h ago•0 comments

Ex-DeepMind David Silver Raises $1.1B for AI Startup Ineffable

https://www.cnbc.com/2026/04/27/deepmind-ineffable-intelligence-record-seed-funding-nvidia-google...
2•gmays•1h ago•0 comments

Coffee appears to rewire the gut-brain connection

https://www.sciencedaily.com/releases/2026/05/260502233911.htm
12•loh•1h ago•5 comments

Show HN: Interactive Marimo Moss Ball

https://github.com/ledhieu/imoss
1•ldhieu•1h ago•0 comments

Nerves in Skin Can Slow Melanoma Growth

https://news.weill.cornell.edu/news/2026/04/nerves-in-skin-can-slow-melanoma-growth
1•gmays•1h ago•0 comments

Ask HN: Do you feel reading AI generated readme tiring?

4•maytc•1h ago•2 comments

Verleer – Learn a language from any content

https://verleer.com
1•CallMePapi-_-•1h ago•0 comments

Pilots Shut Off Both Engines Before China Eastern 737 Crash

https://viewfromthewing.com/pilots-shut-off-both-engines-before-china-eastern-737-crash-china-cit...
3•qsi•1h ago•5 comments

Letters from Steve

https://davidgelphman.wordpress.com/2013/03/29/2-letters-from-steve/
2•prawn•2h ago•0 comments

ChatGPT Wrestles with Its Most Chilling Conversation: How Do I Plan an Attack?

https://www.wsj.com/us-news/chatgpt-mass-shooting-openai-78a436d1
2•Brajeshwar•2h ago•2 comments

OpenAI Codex system includes explicit directive to "never talk about goblins"

https://arstechnica.com/ai/2026/04/openai-codex-system-prompt-includes-explicit-directive-to-neve...
4•randycupertino•2h ago•3 comments

Checkpoint/Restore in Userspace (CRIU)

https://criu.org/Main_Page
1•htfy96•2h ago•0 comments

OpenJDK 25 Security Update Released

https://tux.re/forum/viewtopic.php?t=222
2•sys3000•2h ago•0 comments