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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

New 'color palette' for peptides based on non-natural amino acids

https://phys.org/news/2026-02-scientists-massive-palette-biomedical-natural.html
1•PaulHoule•36s ago•0 comments

The Olympus Programming Language

https://dl.acm.org/doi/pdf/10.1145/3664211
1•rbanffy•44s ago•0 comments

Anthropic Sues DoD

https://www.wired.com/story/anthropic-sues-department-of-defense-over-supply-chain-risk-designation/
1•vessenes•50s ago•0 comments

Building faster than you can think

https://www.augmentcode.com/blog/building-faster-than-you-can-think
1•knes•1m ago•0 comments

Ask HN: Free hosting/cloud providers for free non-profit open source apps?

1•-thrwwy•2m ago•0 comments

NaviServer, a versatile multiprotocol (HTTP(S), etc.) server written in C/Tcl

https://github.com/naviserver-project/naviserver
1•anonnon•2m ago•1 comments

Show HN: Caloriva – A calorie tracker that actually understands

1•caloriva•2m ago•0 comments

Show HN: Colchis Log – cryptographic audit trail for AI systems (Python)

https://github.com/GhurtSky-GR13/colchis-log
2•GhurtSky•3m ago•0 comments

Oil Is Near a Price That Hurts the Economy

https://www.wsj.com/business/energy-oil/oil-is-already-near-a-price-that-hurts-the-economy-3cebcfdc
2•JumpCrisscross•4m ago•0 comments

Random-Bridges as Stochastic Transports for Generative Models

https://arxiv.org/abs/2512.14190
1•sesenai•4m ago•1 comments

AI companies turn knowledge into a proprietary asset. Share your knowledge

https://insidestack.it/blog/ai-companies-turn-knowledge-into-a-proprietary-asset-share-your-knowl...
1•danijelk•4m ago•0 comments

One More Prompt: The Dopamine Trap of Agentic Coding

https://blog.quent.in/blog/2026/03/09/one-more-prompt-the-dopamine-trap-of-agentic-coding/
1•pranay01•5m ago•0 comments

Cloudflare's Agents.md

https://github.com/cloudflare/cloudflared/blob/master/AGENTS.md
1•fernvenue•6m ago•0 comments

Claude helped select targets for recent wave of Iran strikes

https://www.nonzero.org/p/iran-and-the-immorality-of-openai
2•d0able•6m ago•1 comments

The Tree of Up

https://up.com.au/tree/
1•skogstokig•7m ago•0 comments

Show HN: Ratschn – A local Mac dictation app built with Rust, Tauri and CoreML

https://ratschn.com
3•Edos8877•9m ago•0 comments

Show HN: Deadbranch – Interactive TUI for cleaning stale Git branches (Rust)

https://github.com/armgabrielyan/deadbranch
1•armen99•12m ago•0 comments

IDF Officials Admit Military Struggling to Intercept Hezbollah Drones

https://www.haaretz.com/middle-east-news/2026-03-08/ty-article/.premium/idf-officials-admit-milit...
4•johnshades•13m ago•0 comments

Ask HN: How do you keep your data private?

1•mrdependable•13m ago•0 comments

Show HN: Dull – Instagram Without Reels, YouTube Without Shorts

https://getdull.app
1•kasparnoor•13m ago•1 comments

21 Years Living Off-Grid on a Remote Island in a Self-Built Cabin and Homestead [video]

https://www.youtube.com/watch?v=THAupOYwJTs
2•awalGarg•17m ago•0 comments

Increased risk of bullying in open-plan offices

https://www.eurekalert.org/news-releases/1118481
3•pseudalopex•18m ago•1 comments

Show HN: AC-trace–map acceptance criteria to code and tests,then mutate the code

https://github.com/DmytroHuzz/ac-trace
2•dmyhuz•18m ago•0 comments

Show HN: I built a word art generator for 3D printers

https://wordcad.com/
1•ductionist•19m ago•2 comments

Smooth ACT policies on the SO101 arm

https://www.giacomoran.com/blog/act-smooth/
1•ran3000•19m ago•0 comments

Failed YC Startup Ideas

https://startups.rip
2•rgbrgb•21m ago•0 comments

LookingForContributors – Find open source projects that need contributors

https://lookingforcontributors.web.app/
1•himanshurajora•22m ago•1 comments

Query Preprocessing: How we handle 500MB video files as search queries

https://mixpeek.com/blog/query-preprocessing-large-file-search
3•Beefin•22m ago•1 comments

Thinnings: Sublist Witnesses and de Bruijn Index Shift Clumping

https://www.philipzucker.com/thin1/
2•matt_d•23m ago•0 comments

How AI is turning the Iran conflict into theater

https://www.technologyreview.com/2026/03/09/1134063/how-ai-is-turning-the-iran-conflict-into-thea...
1•joozio•23m ago•0 comments