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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

'Vampire Squid from Hell' Reveals the Ancient Origins of Octopuses

https://www.sciencealert.com/vampire-squid-from-hell-reveals-the-ancient-origins-of-octopuses
1•6LLvveMx2koXfwn•1m ago•0 comments

I Built an Automated AI News SaaS – and Yes, You Can Clone the Whole Thing

https://ainewshub2025.netlify.app/
1•dhren•1m ago•1 comments

Airbus faces new quality problem on A320 jets, sources say

https://www.reuters.com/business/aerospace-defense/airbus-faces-new-quality-problem-dozens-a320-j...
1•belter•2m ago•0 comments

Around The World, Part 27: Planting trees

https://frozenfractal.com/blog/2025/11/28/around-the-world-27-planting-trees/
1•todsacerdoti•4m ago•0 comments

The Profit Behind Woke

https://substack.com/home/post/p-178888847
3•pjb88•6m ago•0 comments

Ask HN: Does anybody want LLMs run code in their developer environments?

1•yash_vaddi•7m ago•0 comments

Has the AI Bubble Popped Yet?

https://hastheaibubblepoppedyet.com/
2•bandamo•10m ago•1 comments

1GB Raspberry Pi 5, and memory-driven price rises

https://www.raspberrypi.com/news/1gb-raspberry-pi-5-now-available-at-45-and-memory-driven-price-r...
6•shrx•10m ago•0 comments

UK Government plans new powers to label dissenting movements as 'subversion'

https://netpol.org/2025/11/28/government-plans-new-powers-to-label-dissenting-movements-as-subver...
13•robtherobber•12m ago•1 comments

Doctype – '80s BASIC type-in mags are back, but this time for HTML

https://vole.wtf/doctype/
2•OuterVale•14m ago•0 comments

Self-hosting a Matrix server for 5 years

https://yaky.dev/2025-11-30-self-hosting-matrix/
15•the-anarchist•21m ago•1 comments

Have We Been Explaining E = Hν Backwards for 100 Years?

https://pajuhaan.medium.com/have-we-been-explaining-e-hν-backwards-for-100-years-bd140fec78a9
1•pajuhaan•24m ago•1 comments

How Toxic Culture Costs Companies Time, Talent, and Money and How to Fix It?

https://formrecipe.com/blog/how-toxic-culture-costs-companies-time-talent-money
1•deffrin•27m ago•0 comments

Rooted Resistance: Rashid Johnson's Potted Plants as Living Symbols

https://worldsensorium.com/rooted-resistance-rashid-johnsons-potted-plants-as-living-symbols/
1•dnetesn•28m ago•0 comments

How to Print a Human

https://nautil.us/how-to-print-a-human-1250487/
2•dnetesn•29m ago•0 comments

Supreme Court to Hear Copyright Battle over Online Music Piracy

https://www.nytimes.com/2025/12/01/us/politics/supreme-court-copyright-music-piracy.html
4•pseudolus•29m ago•1 comments

React-State-Custom – Composable global state with native lifecycle management

https://github.com/vothanhdat/react-state-custom
1•datvo•31m ago•1 comments

3D-printable concrete alternative hardens in three days, not four weeks

https://newatlas.com/materials/3d-printable-concrete-alternative/
1•wjSgoWPm5bWAhXB•35m ago•0 comments

A unified geometric model of structural space

https://zenodo.org/records/17687286
1•flexionU•36m ago•0 comments

DeepSeek-v3.2

https://huggingface.co/deepseek-ai/DeepSeek-V3.2
13•meetpateltech•36m ago•0 comments

Ilya Sutskever – We're moving from the age of scaling to the age of research [video]

https://www.youtube.com/watch?v=aR20FWCCjAs
3•bhaktatejas922•39m ago•0 comments

New semiconductor could allow classical and quantum computing on the same chip

https://www.livescience.com/technology/computing/new-semiconductor-could-allow-classical-and-quan...
1•donutloop•40m ago•0 comments

Google Quantum AI realizes three dynamic surface code implementations

https://phys.org/news/2025-11-google-quantum-ai-dynamic-surface.html
1•donutloop•41m ago•0 comments

What Is a City Super App and Why Every City Needs One

https://mertbulan.com/2025/12/01/what-is-a-city-super-app-and-why-every-city-needs-one/
1•mertbio•48m ago•0 comments

Not Just Gaza. From West Bank to Syria and Lebanon, Israel's Onslaught Continues

https://www.theguardian.com/commentisfree/2025/dec/01/gaza-west-bank-syria-lebanon-israel-ceasefire
10•hebelehubele•50m ago•0 comments

Modularization of Supercritical CO2 System for Aircraft Carrier Nuclear Power

https://www.mdpi.com/1099-4300/27/11/1154
1•PaulHoule•50m ago•0 comments

Content-Security-Policy Trust Erosion Scanner

https://github.com/Splinters-io/ghosted
1•splintersio•50m ago•1 comments

AI Hype TRAcking Project

https://poritz.net/jonathan/aitrap/index.html
2•runningmike•52m ago•0 comments

Xlibre is a fork of the Xorg Xserver with lots of code cleanups

https://x11libre.net/
21•doener•56m ago•13 comments

Why Is ChatGPT for Mac So Good?

https://allenpike.com/2025/why-is-chatgpt-so-good-claude
4•ingve•56m ago•0 comments