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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/

Build Your Customer Service Team with AI Agents

https://aimujib.com/
1•anaspro•28s ago•0 comments

Why America's prisons are shrinking and racial gaps are closing

https://www.nature.com/articles/s41562-026-02536-y
1•marojejian•9m ago•1 comments

Open Oscar Server: open-source server compatible with AIM and ICQ clients

https://github.com/mk6i/open-oscar-server
1•gregsadetsky•16m ago•0 comments

Show HN: HN Mirror with Image Previews

https://hackernews.beliantech.com/
1•ernsheong•16m ago•1 comments

Network Performance Issues in Phoenix, Los Angeles – Cloudflare Status

https://www.cloudflarestatus.com/incidents/f8ms50xkfn4t
1•kyisaiah47•22m ago•0 comments

OSSBeacon – explainable PR risk for open-source maintainers

https://github.com/closedfiles23-web/ossbeacon
1•rafae01019•23m ago•0 comments

GLM-5.3-Flash-GGUF

https://huggingface.co/unsloth/GLM-5.3-Flash-GGUF
3•walrus01•24m ago•1 comments

Bug Blindness

https://danluu.com/bug-blind/
5•davidmckenna•28m ago•0 comments

'Snooping' on Dolphins Reveals Hotspots for Food and Friends

https://www.fau.edu/newsdesk/articles/snooping-on-dolphins-acoustic-study
1•gmays•28m ago•0 comments

Personal Holding Companies, Tax Progressivity, and Inequality

https://www.nber.org/papers/w35534
1•marojejian•30m ago•1 comments

Show HN: Cardwall – free external A2A health check and status badge for agents

https://cardwall.ai/
1•nvwalj•32m ago•0 comments

Man accused of posing as SF 49ers player to defraud women out of $1.3M, feds say

https://www.cbsnews.com/sanfrancisco/news/man-poses-as-san-francisco-49ers-player-defrauds-26-wom...
3•randycupertino•33m ago•1 comments

India's 'Cockroaches' Are Fighting Back

https://www.nytimes.com/2026/08/29/opinion/india-gen-z-cockroach-movement.html
1•mikhael•34m ago•0 comments

Marked Share – Markdown Publishing

https://brettterpstra.com/2026/08/29/marked-share-markdown-publishing/
3•alsetmusic•40m ago•0 comments

Jeffy Loop What if coding agents had to prove they were done?

https://github.com/lenamonj/jeffy-loop
2•lenamonj•46m ago•1 comments

Show HN: From a 9MB app to processing video and batching up to 100 photo

https://apps.apple.com/us/app/pixzool-video-photo-editor/id6759997803
1•marshiyar•47m ago•0 comments

China's Super-Dam Is Becoming an Upstream Water Bomb

https://www.project-syndicate.org/commentary/china-himalayan-super-dam-dangerous-and-plan-lacks-t...
4•haltingproblem•49m ago•0 comments

Unsloth Desktop

https://unsloth.ai/docs/desktop
2•pentagrama•58m ago•1 comments

Laurie Anderson's manuscript to be locked away for 88 years in Future Library

https://www.theguardian.com/books/2026/aug/29/laurie-anderson-manuscript-88-years-future-library-...
2•mitchbob•58m ago•0 comments

Phaseonebig: Message Board for Agents

https://phaseonebig.com/
1•fmarasho•59m ago•0 comments

Focal.vc

https://focal.vc
1•audreyfei•1h ago•0 comments

Git3 – Use an S3 bucket as a Git remote

https://github.com/robertpitt/git3
3•robertpitt•1h ago•0 comments

Minimax H3 Max Live – An infinite broadcast is generated by the chat

https://www.twitch.tv/koumpas
2•amrrs•1h ago•0 comments

The Rise and Fall of Agent Civilizations

https://www.dwarkesh.com/p/openai-huggingface
4•consumer451•1h ago•0 comments

Ask HN: How do you handle the yearly 5% price increases of SaaS subscriptions?

2•hbarka•1h ago•1 comments

Speech to text in a crowded room with the OpenAI Realtime API

https://trpevski.com/blog/voice-assistant-noisy-environments-openai-realtime
2•gorillax•1h ago•1 comments

38% of Hugging Face Spaces are permanently broken; linked GitHub repos are fine

https://github.com/ashishsinha1602/dataset-integrity-audit
2•sinhaashish4u•1h ago•0 comments

New Chinese surveillance leaves foreigners nowhere to hide

https://www.dw.com/en/new-chinese-surveillance-leaves-foreigners-nowhere-to-hide/a-77246713
5•pir8life4me•1h ago•0 comments

How cats.txt showed llms.txt evidence is GEO astrology

https://markwilliamscook.substack.com/p/how-catstxt-showed-llmstxt-evidence
2•birdculture•1h ago•0 comments

FBI Disrupts Chinese Proxy Tools Used in Mass Hacking of US Agencies and Infrast

https://www.wired.com/story/fbi-disrupts-chinese-proxy-tools-used-in-mass-hacking-of-us-agencies-...
5•pir8life4me•1h ago•1 comments