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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

Show HN: A Write Barrier That Blocks Structural Collapse in LLM Reasoning

https://github.com/PersistentVlad/persistent-reasoning-architecture/tree/main/appendix/A2_hierogl...
1•persistentVlad•2m ago•1 comments

DMS-100.net: The SL-100 Story

http://www.dms-100.net/telephony/nortel/dms-100/story/
1•john_strinlai•5m ago•0 comments

Show HN: Talkatui – WWE style live commentary for your AI coding sessions

https://github.com/vignesh07/talkatui
1•eigen-vector•5m ago•0 comments

Interview with Øyvind Kolås, GIMP developer

https://www.gimp.org/news/2026/02/22/%C3%B8yvind-kol%C3%A5s-interview-ww2017/
2•ibobev•5m ago•0 comments

Ask HN: Is LLM training infra still broken enough to build a company around?

2•harsh020•6m ago•1 comments

New York sues Valve for enabling "illegal gambling" with loot boxes

https://arstechnica.com/gaming/2026/02/new-york-sues-valve-for-enabling-illegal-gambling-with-loo...
2•strongpigeon•7m ago•0 comments

Hyperbolic Versions of Latest Posts

https://www.johndcook.com/blog/2026/02/25/hyperbolic-versions-of-latest-posts/
1•ibobev•7m ago•0 comments

Anthropic acquires Vercept to advance Claude's computer use capabilities

https://www.anthropic.com/news/acquires-vercept
2•tzury•7m ago•0 comments

Danske Bank adjusts the organisation with role redundancies

https://danskebank.com/news-and-insights/news-archive/press-releases/2026/pr26022026
1•janisz•8m ago•0 comments

How AI skills are quietly automating my workday

https://medium.com/@ricardskrizanovskis/how-ai-skills-are-quietly-automating-my-workday-220a1b7b4707
2•rkrizanovskis•9m ago•1 comments

DeepSeek withholds latest AI model V4 from US chipmakers including Nvidia

https://www.business-standard.com/technology/tech-news/deepseek-withholds-latest-ai-model-v4-from...
2•iamnothere•14m ago•0 comments

Exercise-induced activation of steroidogenic factor-1 neurons improves endurance

https://www.cell.com/neuron/fulltext/S0896-6273(25)00989-4
2•PaulHoule•16m ago•0 comments

The Linux Memory Manager

https://nostarch.com/linux-memory-manager
5•teleforce•17m ago•0 comments

Fueling Open Source with Vibes and Money

https://openpath.quest/2026/fueling-open-source-with-vibes-and-money/
4•whit537•19m ago•0 comments

How to Build Your Own Quantum Computer

https://physics.aps.org/articles/v19/24
2•bikenaga•19m ago•0 comments

Show HN: Open Graph Tag Checker

https://smmall.cloud/tools/open-graph-checker
1•a_band•19m ago•0 comments

Cryptography Engineering Has an Intrinsic Duty of Care

https://soatok.blog/2026/02/25/cryptography-engineering-has-an-intrinsic-duty-of-care/
5•some_furry•19m ago•0 comments

Nano Banana 2

https://nanobanana2-ai.io/
2•sinpor1•20m ago•0 comments

Ask HN: Designing TTL for a B-tree KV store – feedback on dual-index approach

https://github.com/hash-anu/snkv/discussions/41
2•swaminarayan•20m ago•1 comments

You're shipping faster than ever. Are you building the right thing?

https://www.clairytee.com/faster-wrong
2•StnAlex•20m ago•0 comments

The Limits of Legal Control in Technical Systems

https://leastauthority.com/blog/the-limits-of-legal-control-in-technical-systems/
1•iamnothere•20m ago•0 comments

Announcing new Cloud PC devices designed for Windows 365

https://blogs.windows.com/windowsexperience/2026/02/26/announcing-new-cloud-pc-devices-designed-f...
1•el_duderino•20m ago•0 comments

The Pentagon Feuding with an AI Company Is a Bad Sign

https://foreignpolicy.com/2026/02/25/anthropic-pentagon-feud-ai/
4•Jimmc414•21m ago•1 comments

AI buying agents concentrate demand on 2-3 products and ignore the rest

https://arxiv.org/abs/2508.02630
1•dmpyatyi•22m ago•1 comments

Perplexity Computer

https://www.perplexity.ai/hub/blog/introducing-perplexity-computer
2•shadow28•23m ago•0 comments

The Last Question

https://users.ece.cmu.edu/~gamvrosi/thelastq.html
2•simonebrunozzi•23m ago•0 comments

Version of "I Have Nothing to Hide"

https://theprivacydad.com/the-best-version-of-i-have-nothing-to-hide/
2•Brajeshwar•23m ago•0 comments

Show HN: Mthds – Beyond skills: a typed DSL for executable AI methods

https://mthds.ai/0.1.2/
10•lchoquel•24m ago•0 comments

What's the cost for an AI to redo your project?

https://redocost.com
1•svensauleau•25m ago•0 comments

When Chatbots Are Used to Plan Violence, Is There a Duty to Warn?

https://www.nytimes.com/2026/02/26/technology/chatbots-duty-warn-police.html
2•droidjj•25m ago•0 comments