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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/

iPhone Fold Will Be Creaseless and Cost $2,400, Report Says

https://www.cnet.com/tech/mobile/iphone-fold-will-be-creaseless-and-cost-2400-report-says/
1•matthewsinclair•10s ago•0 comments

AI Might Not Harm Us in the Way You Think

https://nautil.us/ai-might-not-harm-us-in-the-way-you-think-1248498/
1•dnetesn•1m ago•0 comments

Show HN: Total Reciprocity Public License

https://trplfoundation.org/
1•jaypatelani•5m ago•0 comments

Have you guys tried Stitch with Google?

http://stitch.withgoogle.com/
1•pradeepodela•9m ago•1 comments

To Get a Man's Attention, Meow Harder

https://www.nytimes.com/2025/11/27/science/cats-meow-men-women.html
1•quapster•12m ago•0 comments

An Advanced Construction ERP System Helps You Prevent Project Delays

https://jeevantech.in/blog/is-your-construction-business-ready-for-erp-signs-you-need-a-digital-u...
1•Jeevantech•14m ago•1 comments

Nvidia reportedly no longer supplying VRAM to its GPU board partners

https://www.tomshardware.com/pc-components/gpus/nvidia-reportedly-no-longer-supplying-vram-to-its...
1•doener•18m ago•0 comments

I just wrote 'Global Agentic Night Berlin we are cooking'

https://buttondown.com/xemantic/archive/global-agentic-night-berlin-we-are-cooking/
1•morisil•23m ago•0 comments

Cats became our companions way later than you think

https://www.bbc.co.uk/news/articles/cq8dvdp9gn7o
3•n1b0m•25m ago•0 comments

Help, My Java Object Vanished (and the GC Is Not at Fault)

https://arraying.de/posts/markword/
2•todsacerdoti•27m ago•0 comments

Show HN: Claude Opus and Front End-Design Skill = Insane Results

https://black-friday-flights.pages.dev/
1•jackculpan•28m ago•0 comments

Ask HN: Best AI model to run on-device on a Google Pixel 10?

1•roschdal•34m ago•0 comments

How the deadly Hong Kong fire spread

https://www.reuters.com/graphics/HONGKONG-FIRE/SPREAD/mopabqnzqva/
4•giuliomagnifico•36m ago•1 comments

Show HN: Z-Image Turbo Online – Free, Fast AI Image Generator

https://z-img.net/
1•hugh1st•41m ago•0 comments

OpenAI partners amass $100B debt pile to fund its ambitions

https://www.ft.com/content/5605d086-289e-4b5f-803b-4c13666976a5
3•merksittich•41m ago•0 comments

Scam Centers Were Blown Up. Was It All for Show?

https://www.nytimes.com/2025/11/28/world/asia/myanmar-scam-centers-junta.html
2•pseudolus•42m ago•1 comments

Fort Knox for your secrets – Manage secrets with encryption or cloud providers

https://fnox.jdx.dev/guide/what-is-fnox.html
2•todsacerdoti•46m ago•0 comments

Project Xanadu

https://xanadu.com/
1•harryday•47m ago•2 comments

Study claims to provide first direct evidence of dark matter

https://www.theguardian.com/science/2025/nov/25/study-claims-to-provide-first-direct-evidence-of-...
2•pseudolus•48m ago•0 comments

Kimi Agentic Slides: Editable and Designer-Level Visuals with Nano Banana Pro

https://www.kimi.com/slides
1•nekofneko•52m ago•0 comments

Datamining a flat in Munich – 10 years later

https://www.munich-datageeks.de/talk-from-bias-to-bots/
1•ilovefood•53m ago•0 comments

Reaktiv – A declarative state management library for Python

https://reaktiv.bui.app/
1•buibuibui•55m ago•0 comments

What is an MEMS Speaker?

https://www.soundguys.com/what-is-a-mems-speaker-107038/
2•tetris11•57m ago•0 comments

Free Pixel Art Snapper (made with Rust)

https://www.spritefusion.com/pixel-snapper
4•gsempe•58m ago•0 comments

Show HN: Agent/LLM observability for tracing, cost, evals, and debugging

https://aback-handbell-1cd.notion.site/Progress-Observability-Platform-2b081d53bbc680fa9f98e7ece2...
1•zlatkov•1h ago•0 comments

Africa's forests have switched from absorbing to emitting carbon

https://phys.org/news/2025-11-africa-forests-absorbing-emitting-carbon.html
9•pseudolus•1h ago•1 comments

The CRDT Dictionary: A Field Guide to Conflict-Free Replicated Data Types

https://www.iankduncan.com/engineering/2025-11-27-crdt-dictionary/
2•iand675•1h ago•0 comments

Windows 11's preloaded File Explorer still slower than 10, and uses more RAM

https://www.windowslatest.com/2025/11/28/tested-windows-11s-faster-file-explorer-preloaded-is-sti...
2•GranPC•1h ago•0 comments

Measure My Mouth – Hold still, open wide, and measure your mouth

https://measuremymouth.com/
1•blurayfin•1h ago•0 comments

Google denies 'misleading' reports of Gmail using your emails to train AI

https://www.theverge.com/news/826902/gmail-ai-training-data-opt-out
6•causenad•1h ago•1 comments