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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

Kobo Offline

https://kobo-offline.virgulilla.com
1•Curiositry•39s ago•0 comments

I parsed the Voynich Manuscript as a 17x73 deterministic data matrix

https://zenodo.org/records/19574356
1•Oi_DataArch•3m ago•0 comments

Free Space Optical Link Utilizing a Modulated Retro-Reflector [pdf]

https://ntrs.nasa.gov/api/citations/20200000354/downloads/20200000354.pdf
1•oldfuture•3m ago•0 comments

Tell HN: Qwen Free Tier Is Discontinued

1•dhruv_ahuja•4m ago•0 comments

Discord CLI Client for Scripting

https://github.com/mrarfarf/discord-cli
2•mrarfarf•5m ago•0 comments

John Earnest, array language audio+graphics hacker

https://alexalejandre.com/programming/interview-with-john-earnest/
2•vi_sextus_vi•10m ago•0 comments

Ask HN: SeedLegals Partnerships in London, worth it?

2•pain_perdu•12m ago•0 comments

Slowburn: Looking Through AMD Platform Configuration Blobs Infrastructure

https://swarm.ptsecurity.com/slowburn-looking-through-amd-platform-configuration-blobs-infrastruc...
1•latchkey•14m ago•0 comments

Corner-Case RCU Implementations

https://people.kernel.org/paulmck/stupid-rcu-tricks-corner-case-rcu-implementations
1•mfrw•15m ago•0 comments

Why Anthropic and OpenAI are locking up their latest models

https://www.economist.com/business/2026/04/15/why-anthropic-and-openai-are-locking-up-their-lates...
2•petethomas•16m ago•0 comments

Routines in Claude Code

https://claude.com/blog/introducing-routines-in-claude-code
2•taubek•17m ago•0 comments

Rippl – Performance marketing inside WhatsApp, Telegram, and Discord communities

https://apps.apple.com/gb/app/rippl-by-mrvl/id6761179465
2•SupaMRVL•21m ago•0 comments

Miss

https://geckopico.substack.com/p/dont-blame-the-ai-blame-those-training
1•aimmia•26m ago•0 comments

IPv8 Proposal

https://www.ietf.org/archive/id/draft-thain-ipv8-00.html
43•EvanZhouDev•29m ago•19 comments

Why Sal Khan's AI revolution hasn't happened yet, according to Sal Khan

https://www.chalkbeat.org/2026/04/09/sal-khan-reflects-on-ai-in-schools-and-khanmigo/
3•the-mitr•31m ago•0 comments

Airbnb discloses a billion-series Prometheus metrics pipeline

https://medium.com/airbnb-engineering/building-a-high-volume-metrics-pipeline-with-opentelemetry-...
3•jmarbach•35m ago•0 comments

Implementing Style Transfer from Scratch

https://github.com/aldipiroli/StyleTransfer_from_scratch
2•tgnk2341•36m ago•0 comments

US jobs too important to risk Chinese car imports, says Ford CEO

https://arstechnica.com/cars/2026/04/us-jobs-too-important-to-risk-chinese-car-imports-says-ford-...
1•teleforce•39m ago•1 comments

How Smart Organizations Will Use AI: Jevons Paradox and Workforce Impact [video]

https://www.youtube.com/watch?v=XVNH8MPRgVY
1•LordNibbler•39m ago•0 comments

Flooding in Chicago is getting worse. Here's why

https://www.wbez.org/environment/2026/04/10/flooding-chicago-climate-change-deep-tunnel-mold-metr...
2•rawgabbit•40m ago•0 comments

AWS/GCP too expensive? Cloudexit.pro will help you move to bare-metal

https://cloudexit.pro/
11•avallark•44m ago•9 comments

Ask HN: How to highlight talent from untraditional backgrounds?

3•etherus•46m ago•0 comments

Engels' Pause and the Permanent Underclass

https://www.fabricatedknowledge.com/p/mythos-and-engels-pause
2•zdw•51m ago•0 comments

Microsoft faces fresh Windows Recall security concerns

https://www.theverge.com/report/912101/microsoft-windows-recall-new-security-concerns-response
2•croes•53m ago•0 comments

Show HN: Centrality – Visualize your how Claude Code operates on your codebase

https://www.centrality.sh/
1•sorenjmadsen•56m ago•0 comments

Git blame your Claude Code setup

https://breaking-changes.blog/treat-your-claude-code-setup-like-a-dev-project/
2•oakhan3•59m ago•0 comments

A short note on interpretability and minds

https://ericjmichaud.com/interp-and-minds/
1•jdkee•1h ago•0 comments

Gemini for Mac

https://gemini.google/mac/
1•thatxliner•1h ago•0 comments

Show HN : ec – terminal nativie Git conflict resolver

https://github.com/chojs23/ec
1•neozz•1h ago•1 comments

Why Israel is Trying to Conquer 10% of Lebanon [video]

https://www.youtube.com/watch?v=LwdSfdEkXPA
2•dataflow•1h ago•0 comments