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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/

The IBM PC, Part 1: Arrival

https://technicshistory.com/2026/07/24/the-ibm-pc-part-1-arrival/
1•cfmcdonald•59s ago•0 comments

A For-Profit Path to Keeping Housing Affordable

https://www.nytimes.com/2026/07/24/realestate/for-profit-affordable-housing-ascent.html
1•donohoe•1m ago•0 comments

AI generated PRs can hide malicious intent across several PRs

https://blog.codacy.com/detecting-malicious-intent-across-ai-generated-pull-requests-a-governance...
1•ARayOutOfBounds•4m ago•0 comments

Fraudulent Dialer (Wikipedia)

https://en.wikipedia.org/wiki/Dialer
1•grubbs•4m ago•0 comments

Microsoft pressures LG into killing unwanted McAfee ads

https://www.theverge.com/tech/970489/lg-mcafee-ads-windows-microsoft-crackdown
1•timpera•6m ago•0 comments

I Made the Perfect Outline Asset for Unity

https://assetstore.unity.com/packages/vfx/shaders/outline-pro-edge-detection-outline-for-urp-brp-...
1•Adam-Hincu•7m ago•1 comments

Emergent Misalignment Recruits a Pre-Existing Persona Subspace

https://arxiv.org/abs/2607.21356
1•sbulaev•7m ago•0 comments

Volkswagen CFO addresses plant closures, job losses as profits sink

https://www.cnbc.com/2026/07/24/volkswagen-earnings-autos-germany.html
1•johnbarron•9m ago•0 comments

Two things every MCP author should add

https://medusajs.com/blog/two-things-every-mcp-author-should-add/
2•shahednasser•10m ago•0 comments

Axon, a TypeScript framework for agent development

https://axon.arclabs.it/docs/v2
1•codywakeford•11m ago•0 comments

Gen Z protests in India demanding resignation of Education Minister

https://www.bbc.com/news/videos/c3307vgneveo
1•Guestmodinfo•11m ago•1 comments

Nexus-env – a simple, powerful, type-safe environment configuration library

https://www.npmjs.com/package/nexus-env
1•omid2007hope•12m ago•0 comments

European researchers want to study social media's harms but can't get the data

https://www.wired.com/story/european-researchers-want-to-study-social-medias-harms-but-cant-get-t...
2•joozio•13m ago•0 comments

Reality Bites Elon Musk and His Tesla, SpaceX Believers

https://www.wsj.com/finance/stocks/reality-bites-elon-musk-and-his-tesla-spacex-believers-1b639591
4•doener•15m ago•0 comments

Ask HN: Any Good Pi.dev Setups?

1•galsapir•16m ago•0 comments

OSS ChatGPT WebUI – Projects, Profiles, Server Tools, 8x Themes, 1-Click Sharing

https://llmspy.org
1•mythz•16m ago•0 comments

Earth and Sun – Bartosz Ciechanowski

https://ciechanow.ski/earth-and-sun/
1•lifeisstillgood•21m ago•0 comments

The Custody Trilemma

https://blog.mozaik.money/the-custody-trilemma/
1•zmilos•21m ago•1 comments

Google reports first quarter of negative cash flow

https://www.bloomberg.com/news/articles/2026-07-22/alphabet-posts-cloud-sales-beat-slight-miss-on...
2•holistio•23m ago•0 comments

Flock cameras keep getting smashed, so now they're hiding inside speed signs

https://www.msn.com/en-us/news/other/flock-cameras-keep-getting-smashed-so-now-they-re-hiding-ins...
3•allgirl•28m ago•1 comments

Show HN: Vinv-Ties every runtime trace to code segment, prevents reward hacking

https://github.com/VinvAI/VinvAI
2•sohamac•30m ago•0 comments

Show HN: SaveAnswer – a local Chrome extension for keeping AI answers searchable

https://chromewebstore.google.com/detail/saveanswer-save-ai-answer/iminapemlncanmmaadedieifgkaeoljm
1•lynnFu•31m ago•0 comments

Fil-C: Garbage In, Memory Safety Out – Filip Pizlo – SSW 2026 [video]

https://www.youtube.com/watch?v=5F-2Y1LPRek
2•ndr•32m ago•0 comments

Show HN: Build native iOS widgets from any HTTPS endpoint

1•elkabong•32m ago•0 comments

Ask HN: How to get in touch with Paddle (MoR)

1•probst•35m ago•0 comments

Show HN: Statistical Football Predictions for Brazil's Loteca Lottery

https://alfavpalpites.com.br
1•fabioricardo7•36m ago•0 comments

Show HN: LLM Proxy - Python with SSE stream aggregation and timeout prevention

https://github.com/lordraw77/llmproxy
1•lordraw•36m ago•0 comments

Show HN: Frontier model pricing became a rip-off, so I built an open-source CLI

https://github.com/kolega-ai/kolega-code
2•fabioricardo7•41m ago•0 comments

New EU Notes Survey

https://surveys.ecb.europa.eu/10b/banknotes/share/
2•steveskids•44m ago•0 comments

My Agent Isn't Autonomous. That's the Point

https://wp.awrshift.com/my-agent-isnt-autonomous/
2•pmserhii•44m ago•1 comments