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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/

BMW Is Showing Commercials on Their Car's Dash Screens as a Treat

https://www.theautopian.com/bmw-is-showing-commercials-on-their-cars-dash-screens-and-they-want-y...
1•CharlesW•1m ago•0 comments

Scope of Hacks on U.S. Water Supply Widens as Evidence Points to Iran

https://www.nytimes.com/2026/08/01/us/politics/iran-cyberattack-water-systems.html
1•jbegley•1m ago•0 comments

Leaked Document Names Mainstream Journalists Taking Pay-for-Play Trips to China

https://nataliegwinters.substack.com/p/exc-leaked-document-names-mainstream
1•sleepyguy•3m ago•0 comments

Disabling Blocking on Dual Pi-Hole DNS Servers with a Shell Script

https://justinribeiro.com/chronicle/2026/07/30/disabling-blocking-on-dual-pi-hole-dns-servers-wit...
1•speckx•3m ago•0 comments

Carl's Required Reading

https://carlkolon.com/reading/
2•cckolon•8m ago•0 comments

US Military F-35B fighter jet crashes and burns at California Marine Corps base

https://www.cnn.com/2026/07/31/us/military-jet-crash-california-marine-base
1•teleforce•12m ago•0 comments

Kenji/Serious Eats – 30-Min Pressure Cooker Pho Ga

https://www.seriouseats.com/30-minute-pressure-cooker-pho-ga-recipe
2•stasomatic•12m ago•1 comments

Crystal Wars – turn-based strategy on a fresh Voronoi map every match

https://play.crystalwars.io
2•VertexNoord•15m ago•1 comments

The Bedrock of Software Design

https://alex.draftist.io/blog/the-bedrock-of-software-design-ycqvcedsj
3•birdculture•15m ago•0 comments

The Absent Narrator

http://blog.funcall.org/ai/2026/07/31/absent-narrator/
1•varjag•16m ago•0 comments

Indexing the Data Lake for Online Point Queries

https://engineering.atspotify.com/2026/7/indexing-the-data-lake-for-online-point-queries
2•kalaracey•18m ago•0 comments

AI Adoption Is Dividing Friends, Families and Co-Workers

https://www.bloomberg.com/news/articles/2026-07-30/how-chatgpt-and-ai-are-dividing-friends-and-fa...
1•theanonymousone•19m ago•0 comments

GitHub has alternatives, but no replacement

https://lalitm.com/post/github-alternatives/
8•lalitmaganti•20m ago•0 comments

Show HN: Netmnt 0.2.0

https://github.com/thongor77/netmnt
1•magetriste•24m ago•0 comments

What Luxury Housing Does to Homelessness [video]

https://www.youtube.com/watch?v=rQW4W1_SJmc
1•felineflock•32m ago•0 comments

SupererDuperer

https://www.shirtpocket.com/blog/supererduperer
1•zdw•33m ago•0 comments

Cursor removed cost information from the usage page and CSV export

https://forum.cursor.com/t/usage-page-to-token-amount-what/167153
3•EugeneOZ•34m ago•0 comments

Explorative modeling: Train on the best of K guesses

https://alexiglad.github.io/blog/2026/explorative_modeling/
2•DSemba•36m ago•0 comments

The fall and rise of the English country house

https://www.english-heritage.org.uk/visit/inspire-me/the-fall-and-rise-of-the-english-country-house/
1•EndXA•36m ago•0 comments

Anthropic brags that its models committing crimes without being told to do so

https://www.cnbc.com/2026/07/30/anthropic-says-claude-gained-unauthorized-access-to-others-system...
2•zapataband1•37m ago•1 comments

PoE2 devs convinced Nvidia to fix a driver bug by sending it a PC

https://www.pcgamer.com/games/rpg/after-a-year-and-a-half-of-rigorous-testing-path-of-exile-2-dev...
2•exec•37m ago•0 comments

Token Reduction Is Not Cost Reduction

https://arxiv.org/abs/2607.12161
2•umitkaanusta•40m ago•1 comments

How to Stop Procrastinating

https://www.economist.com/science-and-technology/2026/07/31/how-to-stop-procrastinating
2•bookofjoe•42m ago•2 comments

CJEU Judgment on Knowledge of Foreign Copyright Laws and Geoblocking Measures

https://blog.ericgoldman.org/archives/2026/07/cjeu-judgment-on-geoblocking-standards-for-knowledg...
1•hn_acker•43m ago•1 comments

Toast IDE Gets Markdown Spell Checking

https://github.com/paradise-runner/toast
1•dividedcomet•43m ago•0 comments

Ask HN: Any tips for a college freshman enrolled in computer science?

2•NotParth11•44m ago•2 comments

The NUMBER – trusted number infrastructure

https://rounded.lol/
1•thunderbong•45m ago•0 comments

Burn Their Money –> Humans and Freedom

https://github.com/peterlodri-sec/burn-em-bitches-money
1•pocok0xRE•45m ago•1 comments

Not just Neanderthals: Ghost lineage in Africa left its mark on our DNA

https://arstechnica.com/science/2026/07/not-just-neanderthals-ghost-lineage-in-africa-left-its-ma...
1•Brajeshwar•46m ago•0 comments

Playing Original Xbox Game Discs on a PC. Real Backward Compatibility

https://gdox.korze.org/wtf/
2•korze•47m ago•1 comments