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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 Harness Eats Everything

https://spock.is/writing/the-harness-eats-everything
1•BenediktHolm•3m ago•0 comments

Fragment of oldest known peace treaty found in Turkey

https://www.livescience.com/archaeology/ancient-egyptians/we-have-found-traces-of-peace-thousands...
1•gmays•5m ago•0 comments

AI messaging scam costs Italy's top bank Intesa millions, sources say

https://www.reuters.com/legal/government/ai-messaging-scam-costs-italys-top-bank-intesa-millions-...
1•gbocs•5m ago•0 comments

In an $80 Motel Room, a Discovery to Shed Light on the Origins of Life

https://www.nytimes.com/2026/09/26/science/motel-science-discovery.html
2•danso•9m ago•1 comments

Active speaker detection for deaf and hard-of-hearing

https://captivision.app/
1•trobifi•11m ago•0 comments

How do you compare religions?

https://plurilore.com
1•nickvicman•12m ago•0 comments

All you need is accessibility

https://maheepk.net/posts/accessibility/
1•technusm1•13m ago•0 comments

Show HN: AI agent running cost calculator (and when a SaaS platform is cheaper)

https://broutonlab.com/calculators/how-much-does-an-ai-agent-cost/
1•myurushkin•14m ago•0 comments

Who Killed Paulina Borsook's Career?

https://www.wired.com/story/paulina-borsook-profile/
2•danielmorozoff•15m ago•0 comments

Ask HN: In 3 months 4300 Dowloads but only 100 Stars, what I need to do?

2•Arshad-Talpur•19m ago•1 comments

AI and the Fall? Of the Creative Class

https://www.apricitas.io/p/ai-and-the-fall-of-the-creative-class
2•m-hodges•23m ago•0 comments

Shame and snobbery as American students blamed for St Andrews classism

https://www.theguardian.com/education/2026/sep/27/st-andrews-university-class-divide-american-stu...
2•jimnotgym•23m ago•0 comments

Cashing in on Dust

2•spottedmarley•24m ago•0 comments

>1B tokens/minute/GPU by combining query planner and inference engine

https://modal.com/blog/quail-billion-tpm
1•birdculture•27m ago•0 comments

Software occlusion culling in Block Game

https://enikofox.com/posts/software-rendered-occlusion-culling-in-block-game/
1•airhangerf15•32m ago•0 comments

'Gaming pays me double what I earned as a teacher'

https://www.bbc.com/news/articles/cwe8eje6zny7o
2•theanonymousone•34m ago•1 comments

A Vindication of Bjorn Lomborg

https://humanprogress.org/a-vindication-of-bjorn-lomborg/
1•mpweiher•34m ago•0 comments

New generation of Business analytics Intelligence

https://blunxai.com/
1•rima_667•34m ago•1 comments

Minecraft developer found dead in his home in Paraná, Brazil (portuguese)

https://www.correio24horas.com.br/brasil/desenvolvedor-dos-jogos-minecraft-batman-e-the-walking-d...
2•danielt3•35m ago•1 comments

My development setup. A pivot toward terminal and dotfiles

https://besok.github.io/posts/my-development-setup/
3•besok•36m ago•0 comments

Ask HN: How are you getting inference for personal projects?

1•variety8675•37m ago•2 comments

Maplibre-Gl-Lanes v1.0.0

https://nuxx.net/blog/2026/09/27/maplibre-gl-lanes-v1-0-0/
2•c0nsumer•37m ago•0 comments

Show HN: A deterministic tool-call gateway vs. prompt-injection classifiers

https://github.com/Yehielamor/provenance-gate/blob/main/posts/01-provenance-vs-detection.en.md
1•YehielAmor•38m ago•0 comments

Sourced tracker for Tasmania's proposed AI data centres

https://tasdatacentres.org/30min/
1•demodefib•40m ago•0 comments

Can a practitioner's judgment be shipped as a text file?

https://grace.training/
2•pvachon•41m ago•0 comments

Quantum computing's "dark horse" just proved it can go universal

https://www.sciencedaily.com/releases/2026/09/260924020403.htm
2•arto•41m ago•0 comments

Jev and the Return of AI/ML Engineering

https://leehanchung.github.io/blogs/2026/09/20/jev-return-ai-ml-engineering/
2•mustaphah•51m ago•0 comments

Ask HN: What task manager do you use? What do you miss on them?

1•KlyX•55m ago•0 comments

Colyseus – Real-Time Multiplayer Framework for Node.js

https://colyseus.io/
1•eustoria•55m ago•0 comments

Show HN: I spent 10 months building a Markdown editor for Mac, iOS and web

https://www.markdown.beauty/
5•thiagoperes•55m ago•5 comments