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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/

When the fractional part of a float fixes your shader

https://crocidb.com/post/when-the-fractional-part-of-a-float-fixes-your-shader/
1•vinhnx•48s ago•0 comments

Geoffrey Litt: Dynamic Documents as Personal Software [video]

https://www.youtube.com/watch?v=MccJdr61xnc
1•surprisetalk•1m ago•0 comments

Hackers Got Inside a Flock Camera. Its Data Shows How the System Works

https://www.wired.com/story/hackers-flock-camera-data-shows-how-system-works/
1•driverdan•2m ago•0 comments

Hackers Stole Flock Camera Software Revealing How Company Tracks Cars and People

https://www.404media.co/hackers-stole-flocks-camera-software-revealing-how-the-company-tracks-car...
1•driverdan•2m ago•0 comments

Chimps teach their kids tool tricks

https://arstechnica.com/science/2026/09/how-chimps-teach-their-kids-tool-tricks/
1•rbanffy•4m ago•0 comments

The Roman telescope has enough gas for 22 years, double NASA's expectations

https://arstechnica.com/space/2026/09/the-roman-telescope-has-enough-gas-for-22-years-double-nasa...
1•rbanffy•5m ago•0 comments

Why building a Rust LSP is hard

https://rust-glancer.github.io/blog/why-lsp-is-hard/
1•popzxc•5m ago•0 comments

DOE Seeks New Path for Future Light Bulb Standard

https://inside.lighting/news/26-07/doe-seeks-new-path-future-light-bulb-standards
1•1970-01-01•6m ago•0 comments

Readest – free open-source ePub and PDF reader

https://readest.com/
1•conferza•7m ago•1 comments

One prompt, answers from multiple AI models side by side

https://www.shortcutchat.com
1•scrappy_guy•8m ago•0 comments

I replaced my brown-noise browser tab with a menu bar app

https://oldmanrahul.com/2026/09/14/hush/
1•oldmanrahul•9m ago•0 comments

Show HN: AI Subtools – 40 free online tools, no sign-up, 100% client-side

https://aisubtools.xyz/
1•devenquan•9m ago•0 comments

Personal Statement on AI Risk

https://twitter.com/dkokotajlo/status/2099600298855829616
2•hentrep•10m ago•0 comments

Linux development is benefiting from AI, but not from its coding

https://www.xda-developers.com/linux-development-is-really-benefiting-from-ai-but-not-from-its-co...
1•losgehts•11m ago•0 comments

I joined the 'anti-chatbox' interface movement, and build Moe because of it

https://moebot.app/
2•yisrael_g•11m ago•1 comments

Show HN: Airmash – HTML5 Multiplayer Missile Warfare

https://airma.sh/
3•fivesigma•12m ago•0 comments

Show HN: Kaflow Search – A desktop tool for locally indexed Kafka message search

https://kaflow-search.whsoul-tools.com/
1•whsoul•12m ago•0 comments

Benchmark Llamacpp on Intel Panther Lake: Vulkan vs. SYCL vs. OpenVINO vs. CPU

https://grigio.org/benchmarking-llama-cpp-backends-on-intel-panther-lake-vulkan-vs-sycl-vs-openvi...
1•grigio•12m ago•0 comments

Building agents? Here is everything you need to know in one long-read

https://opengeni.substack.com/p/the-anatomy-of-an-agentic-stack-ten
2•davletdz•12m ago•0 comments

Show HN: Sloptris - If Tetris was like AI-assisted dev

https://tonyalicea.dev/sloptris/
2•TonyAlicea10•13m ago•1 comments

OpenAI Considers Pre-IPO Funding Round at More Than $1.2T Valuation

https://www.wsj.com/tech/ai/openai-considers-pre-ipo-funding-round-at-more-than-1-2-trillion-valu...
1•bookofjoe•14m ago•1 comments

Scaling Golang CI by Replacing actions/setup-go

https://www.cloudx.ai/posts/setup-go
9•peterldowns•18m ago•1 comments

Show HN: Picxel – Turn reference images into pixel-art game assets

https://github.com/See-Sol-Lab/Picxel
4•Goumang•19m ago•0 comments

Show HN: How Stale Is Your AI? Release age and training cutoff for 20 models

https://stale.jock.pl/
3•joozio•19m ago•0 comments

ImpactGate: A merge gate that scores the structural decay AI adds

https://github.com/officefloor/ImpactGate
5•sagenschneider•19m ago•2 comments

Voyager – defense revenue as a patience subsidy for commercial space station bet

https://beyondhorizonforesight.substack.com/p/voyager-technologies-where-defense
1•beyondhorizonfs•20m ago•0 comments

Corporate and political systems are efficient filters to promote psychopaths

https://www.sciencedirect.com/science/article/pii/S135917892100104X
2•mw67•20m ago•0 comments

Why do people hold vacant land out of use?

https://blog.landeconomics.org/p/why-do-people-hold-vacant-land-out
2•surprisetalk•20m ago•0 comments

Operating System powered by Qwen 3.8 27B at 1950 tokens/SEC

https://twitter.com/analogalok/status/2099130228866228368
2•soltanov•22m ago•0 comments

Fujifilm Launches Palm-Top Size Camera Instax Pal 2 for $170

https://www.fujifilm.com/jp/en/news/hq/13922
1•HelloUsername•23m ago•0 comments