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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

Does Memo from Sunday Robotics have a soul?

https://andyfromthefuture.substack.com/p/does-memo-from-sunday-robotics-have
1•charliejordan•1m ago•0 comments

IQ differences of identical twins reared apart are influenced by education

https://www.sciencedirect.com/science/article/pii/S0001691825003853
3•wjb3•2m ago•0 comments

Pregnant women and their babies endure inhumane conditions in jails

https://www.nbcnews.com/news/us-news/pregnant-women-babies-endure-inhumane-conditions-jails-rcna2...
2•binning•7m ago•0 comments

'A fire, a dog, and the starry sky': the teens overcoming phone addiction

https://www.theguardian.com/film/2025/nov/25/folktales-film-teens-anxiety-phone-addiction-norway
2•binning•8m ago•0 comments

Bro boost: women say their LinkedIn traffic increases if they pretend to be men

https://www.theguardian.com/technology/2025/nov/22/bro-boost-women-find-linkedin-traffic-drives-i...
1•binning•10m ago•0 comments

From OTel to Rotel: Petabyte-scale tracing with 4x greater throughput

https://clickhouse.com/blog/otel-to-rotel-petabyte-scaling-tracing-4x-greater-throughput
1•mike_heffner•10m ago•0 comments

Americans Are Holding onto Devices Longer

https://www.cnbc.com/2025/11/23/how-device-hoarding-by-americans-is-costing-economy.html
1•m463•12m ago•1 comments

What if a tiny black hole shot through your body? Physicist did the math

https://www.sciencealert.com/what-if-a-tiny-black-hole-shot-through-your-body-a-physicist-did-the...
1•dxs•12m ago•0 comments

Ask HN: Solo founders – is your LLM filling the cofounder gap?

1•kevos•16m ago•3 comments

Russia deploys "age verification" via government-run messenger

https://twitter.com/NatalkaKyiv/status/1988434190766141770
1•pona-a•18m ago•0 comments

LLM Latency Ranking

https://metrik-dashboard.vercel.app/
1•mbouassa•18m ago•0 comments

Landlords' go-to tool to set rent prices to be gutted under RealPage settlement

https://arstechnica.com/tech-policy/2025/11/realpage-agrees-to-change-algorithm-so-landlords-cant...
1•WarOnPrivacy•19m ago•0 comments

ChatGPT vs. StackOverflow vs. Reddit in helping with a tricky web dev problem

https://mmkthecoolest.gitlab.io/blog/2025-11-23-data-point-chatgpt-vs-stackoverflow-vs-reddit-in-...
1•mmkthecoolest•20m ago•0 comments

Actors: The Four Properties That Eliminate Complexity

https://www.rivet.dev/learn/act-1/scene-1-a-radically-simpler-architecture
1•NathanFlurry•20m ago•0 comments

Transparent.html: A self-referential experiment in making web infra visible

https://relevant.space/transparent.html
2•starkparker•20m ago•0 comments

Show HN: Secure private diffchecker with merge support

https://diffchecker.dev
5•subhash_k•24m ago•3 comments

Windows deep internals: SASS latency table and instructions reordering

http://redplait.blogspot.com/2025/11/sass-latency-table-instructions.html
2•transpute•25m ago•0 comments

Lovable acquires cloud provider Molnett

https://lovable.dev/blog/lovable-welcomes-molnett
2•vikeri•25m ago•0 comments

AI tool helps visually impaired users 'feel' where objects are

https://www.psu.edu/news/engineering/story/ai-tool-helps-visually-impaired-users-feel-where-objec...
1•geox•25m ago•0 comments

Retro Gaming Museum in Vienna, Austria

https://marincomics.com/retro-gaming-museum.html
2•marinbala•27m ago•1 comments

Neurocode – Google Maps for your AI agent repository

https://github.com/gabrielekarra/neurocode
1•gabrielekarra•28m ago•0 comments

Atlanta's First Government-Funded Supermarket

https://www.wsj.com/real-estate/commercial/atlanta-georgia-public-state-grocery-store-d4e11ad8
2•kiddz•29m ago•0 comments

James Cameron Says Netflix Movies Shouldn't Be Eligible for Oscars

https://www.worldofreel.com/blog/2025/11/24/james-cameron-doesnt-think-netflix-should-compete-for...
4•randycupertino•29m ago•5 comments

Not good news: The FDA is conducting fewer foreign inspections

https://www.foodpolitics.com/2025/11/not-good-news-the-fda-is-conducting-fewer-foreign-inspections/
2•speckx•29m ago•0 comments

Deploying a ChatGPT clone (the hard way)

https://www.natebrake.com/blog/brake-chat
1•njbrake•34m ago•1 comments

Nano Banana Pro: raw intelligence with tool use

https://quesma.com/blog/nano-banana-pro-intelligence-with-tools/
2•amrrs•35m ago•0 comments

Unique Russian A-60 Laser Testbed Jet Destroyed in Ukrainian Attack

https://www.twz.com/air/unique-russian-a-60-laser-tesbed-jet-destroyed-in-ukrainian-attack
5•pinewurst•36m ago•0 comments

I recorded a 2h meeting on my iPhone and got a full summary and PDF in 5 minutes

https://apps.apple.com/gb/app/whisperer-ai-note-taker/id6755069300
1•deepskyapps•36m ago•0 comments

New limits on school loans could narrow physician and nurse pipeline, they warn

https://www.npr.org/sections/shots-health-news/2025/11/25/nx-s1-5619731/medical-nursing-school-lo...
3•stopbulying•37m ago•1 comments

Using Nano Banana to make slideshows

https://twitter.com/ananddtyagi/status/1993380894325809274
1•ananddtyagi•38m ago•0 comments