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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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: Laser, a minimal coding agent whose only tool is the terminal

https://github.com/ExpressGradient/laser
2•Sai_Praneeth•2m ago•0 comments

A data model for Git (and other docs updates)

https://jvns.ca/blog/2026/01/08/a-data-model-for-git/
1•jasonpeacock•3m ago•0 comments

Show HN: I used AI and embeddings to build word-chain puzzles with closed loops

https://puzzles.madebynathan.com/chains?date=2026-01-11&utm=hn
1•nathan_f77•5m ago•1 comments

A tool that clusters real user pain from public forum posts

1•Max_bignolet•5m ago•0 comments

Show HN: blaze-keys for zsh – run commands faster via leader-key combos

https://github.com/enhanced-primate/blaze-keys
1•enhancedprimate•7m ago•0 comments

Show HN: Fun things to do with your VM/370 machine

https://rbanffy.github.io/fun-with-old-mainframes.github.io/fun-with-vm370.html
2•rbanffy•10m ago•0 comments

Data on AI Chip Sales

https://epoch.ai/data/ai-chip-sales
1•thunderbong•11m ago•0 comments

Data centers – Don't we have enough already?

https://www.buzzsprout.com/2469780/episodes/18477666-19-data-centers-don-t-we-have-enough-already
1•jammcq•11m ago•1 comments

The AI-powered Veblen economy

https://reducibleerrors.com/the-veblen-economy/
1•simonpure•12m ago•0 comments

Technology Readiness Levels

https://www.nasa.gov/directorates/somd/space-communications-navigation-program/technology-readine...
1•ksec•12m ago•0 comments

Bag of Heavy Groceries

https://ahmeto.com/p/bag-of-heavy-groceries
1•ahmetomer•12m ago•0 comments

Instagram data breach reportedly exposed the personal info of 17.5M users

https://www.engadget.com/cybersecurity/an-instagram-data-breach-reportedly-exposed-the-personal-i...
4•IvanAchlaqullah•13m ago•0 comments

The Abuse Factory in Dublin

https://www.thegist.ie/the-gist-the-abuse-factory/
1•donohoe•13m ago•0 comments

Time and Risk

https://www.tornikeo.com/time-and-risk/
1•tornikeo•14m ago•0 comments

Show HN: Slate Journey – small challenging web game

https://maku.fun/slate-journey
1•me404•14m ago•0 comments

The role of LDL cholesterol in ASCVD

https://peterattiamd.com/the-role-of-ldl-cholesterol-in-ascvd/
1•brandonb•14m ago•0 comments

Universal Commerce Protocol

https://ucp.dev/
2•meetpateltech•16m ago•0 comments

Running LLMs Locally with Docker Model Runner and Python

https://theaiops.substack.com/p/running-llms-locally-with-docker
1•ramikrispin•16m ago•1 comments

SETA: Scaling Environments for Terminal Agents

https://www.camel-ai.org/blogs/seta-scaling-environments-for-terminal-agents
1•frozenseven•18m ago•0 comments

HN: DunSocial – AI scheduler that learns your voice and writes your posts

https://www.dunsocial.com
1•spikey_sanju•21m ago•1 comments

Everything you need to know about act() in React tests

https://howtotestfrontend.com/resources/react-act-function-everything-you-need-to-know
2•howToTestFE•21m ago•0 comments

Show HN: SayNo – Task manager that forces Signal vs. Noise prioritization

https://sayno.dev/
2•crop04•22m ago•0 comments

Building a sync-engine and reactivity system with SQLite

https://antoine.fi/sqlite-sync-engine-with-reactivity
2•goranmoomin•23m ago•0 comments

Kubernetes Was Overkill. We Moved to Docker Compose and Saved 60 Hours

https://medium.com/engineering-playbook/kubernetes-was-overkill-we-moved-to-docker-compose-and-sa...
4•maxloh•26m ago•0 comments

Aaron Swartz died 13 years ago today

14•vitaelabitur•26m ago•1 comments

Good AI, Bad AI – The Experiment

https://willmcgugan.github.io/good-ai-bad-ai/
3•lumpa•27m ago•0 comments

X to open source their recommendation engine

https://gizmodo.com/elon-musk-says-in-one-week-he-will-fully-reveal-why-your-x-timeline-is-like-t...
2•shikaan•27m ago•0 comments

PyTorch on a $6 Computer

https://www.hackster.io/spartacoos/pytorch-on-a-6-computer-efb4ff
2•7777777phil•28m ago•0 comments

Why Growth Feels Like Drag: The Complexity Threshold at 25 Employees

2•niplomatic•29m ago•0 comments

Building the Universal Commerce Protocol

https://shopify.engineering/ucp
3•emschwartz•30m ago•0 comments