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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

Uses for Nested Promises

https://blog.jcoglan.com/2026/03/23/uses-for-nested-promises/
1•bkudria•38s ago•0 comments

HN: Distill-CBL, a single-file COBOL-to-WASM compiler in Rust

https://github.com/StealthEyeLLC/distill-cbl
1•stealtheyellc•6m ago•0 comments

Show HN: Remote Coasts – Horizontally scale localhost environments

https://coasts.dev/blog/introducing-remote-coasts
1•jsunderland323•8m ago•0 comments

AI Image Editor

https://jpgtomp4.com
1•yalvhe2009•8m ago•1 comments

BirdNET-Go – 24/7 realtime bird song analysis

https://github.com/tphakala/birdnet-go
1•darknavi•9m ago•1 comments

Show HN: Turn any YouTube video into something you can use

https://www.pandarecord.com/extension
1•misonic•11m ago•0 comments

Drawing Database – Blueprints for 3D modeling

https://drawingdatabase.com/
1•hyperific•14m ago•0 comments

Ecolibrium Directory

https://github.com/simonlpaige/ecolibrium
1•larrytheworm•16m ago•1 comments

PocketLLM – Run local LLMs from a USB stick

https://github.com/vraj00222/pocketllm
1•vrajpatel00•17m ago•0 comments

Apple's accidental moat: How the "AI Loser" may end up winning

https://adlrocha.substack.com/p/adlrocha-how-the-ai-loser-may-end
2•walterbell•25m ago•0 comments

2014: Black Holes and Supercomputing

https://www.goldengooseaward.org/01awardees/black-holes
1•mooreds•37m ago•0 comments

Tell HN: Reddit now demands to know why you won't use their app

4•josephcsible•53m ago•4 comments

The disappearing and unappreciated art of audible alerts [video]

https://www.youtube.com/watch?v=nXdVG45wveo
2•fortran77•56m ago•0 comments

Show HN: A better alternative to CLI and MCP for local tools

https://github.com/stefanwebb/named-pipes
1•stefanwebb•57m ago•0 comments

Molecular adaptations and engineering of extremophiles for synthetic biology

https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2026.1754802/full
1•PaulHoule•1h ago•0 comments

Ukraine renews attacks on Russian energy sites – what has been hit?

https://www.reuters.com/business/energy/ukraine-renews-attacks-russian-energy-sites-what-has-been...
2•YZF•1h ago•1 comments

Is the Nutrition of an Egg the Same as in the Chick?

https://drjohnson.com/is-the-nutrition-of-an-egg-the-same-as-in-the-chick/
1•debo_•1h ago•0 comments

ReceiptBot – Stop Node.js AI agents from reading .env and burning your budget

https://github.com/redshadow912/ReceiptBot
1•LocalhostLegend•1h ago•1 comments

Show HN: Narrate – Generate multi-voice long-form audio with one command

https://github.com/zackham/narrate
2•zackham•1h ago•0 comments

Writing should have a soul and its own Claude Skill

https://getlago.substack.com/p/open-sourcing-my-writing-claude-skill
5•AnhTho_FR•1h ago•0 comments

Show HN: Yet another AI image ediotr and generator

https://imageditor.net/
1•shawnta•1h ago•0 comments

Ask HN: What was the limiting factor in growth of demand for fiber during 2000s?

1•AbstractH24•1h ago•6 comments

All elementary functions from a single binary operator

https://arxiv.org/abs/2603.21852
16•pizza•1h ago•7 comments

Moat: Run AI agents in isolated containers

https://majorcontext.com/moat/
2•cjbarber•1h ago•1 comments

State of Homelab 2026

https://mrlokans.work/posts/state-of-homelab-2026/
4•swq115•1h ago•0 comments

Level 3 Thinking: A Unified Theory of Self-Improvement

https://www.nateliason.com/blog/level-3-thinking
1•theorchid•1h ago•0 comments

OpenMAIC – Open Multi-Agent Interactive Classroom

https://open.maic.chat/
2•9woc•1h ago•0 comments

The Social Battery Paper: Gradient, Constraint, and the Extraction of Work In

https://www.academia.edu/165644285/The_Social_Battery_Paper_Gradient_Constraint_and_the_Extractio...
2•WilliamGriffin•1h ago•0 comments

Sabiondo: Compilador semántico universal – compilamos intención no sintaxis

https://github.com/K3iSoft/Sabiondo
1•K3iSoft•1h ago•0 comments

The Business Case for Vanilla JavaScript

https://lewiscampbell.tech/blog/250430.html
3•JSR_FDED•1h ago•0 comments