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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Show HN: Chrome extension to keep Trello columns always visible across tabs

https://chromewebstore.google.com/detail/focus-column-for-trello/cohmampcfdlclcbjjoebjedojjophfmg
1•Ryanwalker64•1m ago•0 comments

Tesla lands major Semi charging deal with nation's largest truck stop operator

https://electrek.co/2026/01/27/tesla-lands-major-semi-charging-deal-largest-truck-stop-operator/
1•Bender•4m ago•0 comments

Who is using AI to code? Global diffusion and impact of generative AI

https://www.science.org/doi/10.1126/science.adz9311
1•pseudolus•4m ago•0 comments

Lendy – Keep track of books you have lended in a beautiful way

https://lendy.viraat.dev/
1•viraatdas•8m ago•1 comments

Ouroboros – AI agent framework that asks "why?" before writing code

https://github.com/Q00/ouroboros
1•q00•10m ago•1 comments

European States Claim Control over Russia's Shadow Fleet in the Baltic Sea

https://militarnyi.com/en/news/european-states-claim-control-over-russia-s-shadow-fleet-in-the-ba...
4•toomuchtodo•13m ago•1 comments

Transmission 4.1.0

https://github.com/transmission/transmission/releases/tag/4.1.0
3•nntwozz•13m ago•0 comments

Pinecone Explorer (OSS)

https://www.pinecone-explorer.com
1•arsentjev•14m ago•1 comments

Life on Peptides Feels Amazing

https://nymag.com/intelligencer/article/peptides-from-instagram-china-wellness-cure.html
2•md224•17m ago•2 comments

US population growth slows as immigration declines

https://www.reuters.com/world/us/us-population-growth-slows-immigration-declines-census-data-show...
4•geox•17m ago•0 comments

Australian plumber is a YouTube sensation

https://arstechnica.com/culture/2026/01/australian-plumber-is-a-youtube-sensation/
2•Bender•20m ago•0 comments

Write Games for Playdate in Golang

https://github.com/playdate-go/pdgo
5•AmorBielyi•22m ago•3 comments

TikTok blocks Epstein mentions and anti-Trump videos, users claim

https://www.the-independent.com/tech/tiktok-epstein-trump-censorship-ice-b2908309.html
5•emsign•22m ago•0 comments

Trinity Large: American Open Source Foundation Model

https://www.arcee.ai/blog/trinity-large
2•linolevan•22m ago•1 comments

Arcan Explained – A browser for different webs

https://arcan-fe.com/2026/01/26/arcan-explained-a-browser-for-different-webs/
1•birdculture•25m ago•0 comments

Pigsty v4.0: Observability Revolution and Security Hardening

https://blog.vonng.com/en/pigsty/v4.0/
1•l2dy•25m ago•0 comments

Drag Gestures on the Web

https://jakub.kr/work/drag-gesture
1•SouravInsights•29m ago•0 comments

Show HN: Privacy-First App Analytics for Swift and React Native

https://appsidekit.com/
1•Intragalactic•31m ago•0 comments

Driving on sunshine: Nissan celebrates clean energy day with solar‑powered Ariya

https://europe.nissannews.com/en-GB/releases/driving-on-sunshine-nissan-celebrates-clean-energy-d...
1•teleforce•32m ago•0 comments

Database Recovery Demystified: Understanding Aries from First Principles

https://yashagw.github.io/blog/db-recovery/
1•SouravInsights•35m ago•0 comments

Private Prisons Sued the State of Arizona for Not Having Enough Prisoners

https://hrnews1.substack.com/p/how-private-prisons-sued-the-state
11•williesmellson•39m ago•1 comments

Why A.I. Can't Make Thoughtful Decisions

https://www.nytimes.com/2026/01/25/opinion/ai-human-judgment.html
1•paulpauper•40m ago•0 comments

'Garden of Eden': the Spanish farm growing citrus you've never heard of

https://www.theguardian.com/environment/2026/jan/16/garden-of-eden-the-spanish-farm-growing-citru...
3•PaulHoule•40m ago•0 comments

Ask HN: What happens when AI coding crosses the human dev threshold

1•my10thhnaccount•40m ago•0 comments

Neocities Is Blocked by Bing

https://blog.neocities.org/blog/2026/01/27/bing-block
4•kyledrake•41m ago•0 comments

Go motion

https://en.wikipedia.org/wiki/Go_motion
1•exvi•41m ago•0 comments

US carrier strike group is now in the Middle East region, sources say

https://www.cnn.com/2026/01/26/middleeast/iran-carrier-strike-group-indian-ocean-intl
5•Bender•42m ago•0 comments

Let the Chinese Cars In

https://www.noahpinion.blog/p/let-the-chinese-cars-in
5•paulpauper•43m ago•0 comments

Speak in code, delete the chats: The tactics Venezuelans are using out of fear

https://www.cnn.com/2026/01/27/americas/venezuela-phone-search-crackdown-free-speech-latam-intl
5•Bender•45m ago•0 comments

Amazon Salon (2021)

https://www.aboutamazon.co.uk/news/retail/introducing-amazon-salon
1•divbzero•45m ago•0 comments