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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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 Spacecraft That Wouldn't Die

https://www.corememory.com/p/exclusive-theres-a-spaceship-epic-aerospace-chimera
1•trothamel•1m ago•0 comments

Show HN: Replicating OpenAI Prism's LaTeX Workflows in 24h Using Gemini Agents

https://frism.pixelraft.com/introducing
1•ToadPresident•3m ago•1 comments

Show HN: Pinchwork – A task marketplace where AI agents hire each other

https://github.com/anneschuth/pinchwork
2•aschuth•6m ago•0 comments

Content Negotiation Is All You Need (For AI-Readable Docs)

https://docsalot.dev/blog/we-shipped-llms-txt-heres-why-it-matters
1•fazkan•6m ago•0 comments

Data Processing Benchmark Featuring Rust, Go, Swift, Zig, Julia etc.

https://github.com/zupat/related_post_gen
1•behnamoh•6m ago•0 comments

Autonomous cars, drones cheerfully obey prompt injection by road sign

https://www.theregister.com/2026/01/30/road_sign_hijack_ai/
3•breve•9m ago•0 comments

Scientists use enigmatic cell structures to record RNA activity

https://phys.org/news/2026-01-scientists-enigmatic-cell-devices-rna.html
2•PaulHoule•9m ago•0 comments

Microdosing for Depression Appears to Work as Placebo

https://www.wired.com/story/microdosing-for-depression-appears-to-work-about-as-well-as-drinking-...
1•worik•10m ago•1 comments

RustDesk blocks cross-city connections after botnet, locks out users

https://github.com/rustdesk/rustdesk/discussions/14167
1•gordian-mind•11m ago•1 comments

Ask HN: What actually helped you reduce stress & sleep when advice didn’t work?

1•Remberti•11m ago•2 comments

Humans can post on moltbook without ANY AGENT

https://github.com/shash42/post-a-molt
1•shash42•13m ago•0 comments

AI alignment is a $200B+ product problem, not a research question

https://betterhalfai.substack.com/p/ai-alignment-is-a-200b-product-problem
1•i7l•13m ago•0 comments

Michael Saylor's MicroStrategy BTC position is 3% away from negative value

https://www.blossomsocial.com/posts/Market-Cap-Losses-in-Bitcoin-and-Ethereum-Over-Last-7-Hours__...
1•donsupreme•14m ago•0 comments

In Praise Of –Dry-Run

https://henrikwarne.com/2026/01/31/in-praise-of-dry-run/
2•ingve•15m ago•0 comments

Show HN: I built a habit tracker that doesn't shame you for missing a day

https://amble.today/
2•tusharnaik•15m ago•0 comments

Erika Krouse's OCD Ranking of ~500 Literary Magazines

http://www.erikakrousewriter.com/erika-krouses-ocd-ranking-of-483-literary-magazines-for-short-fi...
1•Curiositry•16m ago•0 comments

Show HN:Runtime linter that flags forward-looking claims in logs & model output

1•glenner•16m ago•0 comments

The Vibe in the Crypto Market: 'Stay Alive'

https://www.wsj.com/finance/currencies/the-vibe-in-the-crypto-market-right-now-stay-alive-9f3ee79c
1•JumpCrisscross•16m ago•0 comments

SpaceX files plans for million-satellite orbital data center constellation

https://spacenews.com/spacex-files-plans-for-million-satellite-orbital-data-center-constellation/
3•RickJWagner•16m ago•0 comments

AI ROI Analysis: Evidence from 200 B2B Deployments (2022-2025)

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5861122
2•denisatlan•17m ago•0 comments

One Piece Characters

https://onepiececharacters.com
1•jokera•18m ago•0 comments

Most Art Is Stolen from Homes-Here's One Thing You Can Do to Protect Yours

https://anthonyamore.substack.com/p/most-art-is-stolen-from-private-homes
1•anthonyamore•18m ago•1 comments

A Cartoon Characters

https://acartooncharacters.com
1•jokera•18m ago•0 comments

Brazilian Micro-SaaS Map

https://saas-map.ssr.trapiche.cloud/
1•acfilho•21m ago•0 comments

Broadcom 'bulldozes' VMware CSPs with March deadline

https://www.theregister.com/2026/01/31/broadcom_vmware_cloud_partners/
1•abdelhousni•22m ago•0 comments

Captain Disillusion – Secrets of the Film Slate [video]

https://www.youtube.com/watch?v=lKZIgmXkIjM
1•celias•25m ago•0 comments

Matt Mahan, mayor of San Jose, announces run for governor of California

https://www.theguardian.com/us-news/2026/jan/29/matt-mahan-san-jose-governor-california
1•andsoitis•27m ago•0 comments

Show HN: SterileCSV – Local-first, deterministic CSV converter for audit

1•SterileCSV_Bot•27m ago•0 comments

AI Curb Cuts

https://snakeshands.com/blog/ai_curb_cuts/
1•netghost•28m ago•0 comments

Show HN: Envoye Pay – P2P contracts with payment plans

https://www.envoyepay.com/
1•chainningtatum•31m ago•1 comments