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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•5mo ago

Comments

trane_project•5mo 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/

BBC Newsnight accused selectively editing same Trump Capitol speech as Panorama

https://www.theguardian.com/media/2025/nov/13/newsnight-accused-of-selectively-editing-same-trump...
1•canucker2016•9s ago•0 comments

Has Airbnb reached its peak?

https://www.economist.com/business/2025/11/02/has-airbnb-reached-its-peak
1•pseudolus•2m ago•1 comments

Night lighting increases ecosystem CO2 release without boosting absorption

https://phys.org/news/2025-11-pollution-silent-threat-planet-easily.html
1•ptrsrtp•2m ago•0 comments

What I learned about programming (and life) by running

https://the-nerve-blog.ghost.io/learning-from-running/
1•mprast•3m ago•0 comments

Show HN: Granola API Reverse Engineering

https://github.com/getprobo/reverse-engineering-granola-api
1•gearnode•4m ago•0 comments

AI is making hedge funds unable to hedge

https://www.axios.com/2025/10/30/ai-nvidia-hedge-funds
1•paulpauper•4m ago•0 comments

Ketogenic Diet May Help Ease Depression

https://www.medscape.com/viewarticle/ketogenic-diet-may-help-ease-depression-review-suggests-2025...
1•wjb3•4m ago•1 comments

Blue Origin lands New Glenn rocket booster on second try

https://techcrunch.com/2025/11/13/blue-origin-lands-new-glenn-rocket-booster-on-second-try/
6•perihelions•5m ago•0 comments

Show HN: A Serious Language App

https://app.codex4.com/
1•jounus•5m ago•0 comments

Code Wiki: Accelerating your code understanding

https://developers.googleblog.com/en/introducing-code-wiki-accelerating-your-code-understanding/
1•richards•7m ago•0 comments

I posted my project here and the visitor counter went wild – here it is again

https://number-garden-alive.netlify.app/
1•cpuXguy•11m ago•0 comments

OpenMANET Wi-Fi HaLow open-source project for Raspberry Pi–based MANET radios

https://openmanet.net/
5•hexmiles•11m ago•0 comments

Professional Programming: The First 10 Years

https://thorstenball.com/blog/2022/05/17/professional-programming-the-first-10-years/
2•andection•12m ago•0 comments

Jeff Atwood doesn't like DHH

https://twitter.com/dhh/status/1988510654244794874
5•bitbasher•13m ago•0 comments

The Department of Labor is embracing AI

https://www.dol.gov/agencies/eta/ui-modernization/aiaa
2•sans_souse•15m ago•0 comments

Writing is probably the worst use case of AI

https://www.sitepoint.com/worst-use-case-of-ai/
2•zain37•16m ago•0 comments

Unlocking the Power of C++ and WASM

https://naurislinde.dev/blog/unlocking-the-power-of-c-and-wasm-a-complete-step-by-step-guide
2•sref•18m ago•0 comments

Michael Burry to close hedge fund as he warns on valuations

https://www.ft.com/content/cec33db6-7842-4bf5-80d5-677007bcab3e
2•amrrs•19m ago•2 comments

Ford CEO says he has 5k open mechanic jobs with 6-figure salaries

https://fortune.com/2025/11/12/ford-ceo-manufacturing-jobs-trade-schools-we-are-in-trouble-in-our...
6•Anumbia•20m ago•3 comments

Socialist Politics Can Break Through to Asian Immigrants

https://jacobin.com/2025/10/mamdani-socialist-politics-asian-immigrants/
1•PaulHoule•21m ago•0 comments

A Philosophy of Software Design vs. Clean Code (2024)

https://github.com/johnousterhout/aposd-vs-clean-code
1•eden-u4•22m ago•0 comments

Measuring Political Bias in Claude

https://www.anthropic.com/news/political-even-handedness
1•janpio•22m ago•1 comments

1942 KNILM Douglas DC-3 shootdown

https://en.wikipedia.org/wiki/1942_KNILM_Douglas_DC-3_shootdown
1•skylurk•24m ago•0 comments

Show HN: An AI to automate busywork for managers in tech

https://getharmony.ai/
1•Vishal19111999•26m ago•0 comments

Programming the Commodore 64 with .NET

https://retroc64.github.io/
1•mariuz•27m ago•0 comments

Show HN: An interactive 2D fractal tree generator/simulator created in Java

https://github.com/hexaredecimal/TreeLibre
1•mfanakagama•27m ago•0 comments

Ask HN: On-prem vs. self-serve for my SaaS?

1•Vishal19111999•28m ago•0 comments

Ask HN: How far have you gone creating a digital twin?

2•apeters•28m ago•1 comments

Rage Baiting Product Strategy Is for Losers

https://twitter.com/jordihays/status/1988684127017800056
2•nowflux•29m ago•0 comments

Drawbot – let's hack something cute

https://www.atredis.com/blog/2025/9/30/drawbot-lets-hack-something-cute
1•recessive_gene•29m ago•0 comments