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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

Qwen launched new open source TTS models

https://huggingface.co/collections/Qwen/qwen3-tts
1•binsquare•30s ago•0 comments

B-2 Spirit – a browser-based tactical bomber game

https://makari.world/games/B2Spirit.html
1•Emmy4life•37s ago•1 comments

Ask HN: How do you authorize AI agent actions in production?

1•naolbeyene•48s ago•0 comments

Sending Patches via Email with Git

https://en.andros.dev/blog/75beece9/sending-patches-via-email-with-git/
1•andros•1m ago•0 comments

Show HN: Curor/Lovable for Writing

https://bluefeather.ai
1•Damianroot•1m ago•0 comments

Show HN: SkillLens – scan and audit locally installed agent skills

https://skilllens.run
1•morozred•2m ago•0 comments

From Pilot to Proof – Real‑World Evaluation and Drift Monitoring for Health AI

https://spin.atomicobject.com/drift-monitoring-health-ai/
1•philk10•2m ago•0 comments

Show HN: LLM-X – Know How Much Memory Your LLM Needs

https://github.com/Sheikyon/LLM-X
1•sheikyon•2m ago•0 comments

Visualizing embedding vectors as heatmaps for explaining their low level nature

https://tanelpoder.com/catvector/heatmap?dataset=cats
1•tanelpoder•4m ago•0 comments

Can an AI Pass Freshman CS? [video]

https://www.youtube.com/watch?v=56HJQm5nb0U
1•harttrav•6m ago•0 comments

Palantir, Meta, OpenAI Execs Appointed Lieutenant Colonels in US Army

https://twitter.com/SecArmy/status/1933693585183965372
2•alexmorley•6m ago•0 comments

Schrödinger's cat got bigger: physicists create largest ever 'superposition'

https://www.nature.com/articles/d41586-026-00177-9
1•Brajeshwar•7m ago•0 comments

Sending babies to nursery reshapes their microbiomes

https://www.nature.com/articles/d41586-026-00178-8
1•Brajeshwar•8m ago•0 comments

Mystery tower fossils may come from a newly discovered kind of life

https://www.scientificamerican.com/article/mystery-prototaxites-tower-fossils-may-represent-a-new...
1•Brajeshwar•8m ago•0 comments

Neutrality Is Not a Shield

https://militaryrealism.blog/2026/01/22/neutrality-is-not-a-shield/
1•baud147258•8m ago•0 comments

Show HN: Hueflow – Additive Color Mixing

https://playdropstack.com/hueflow/
1•lastodyssey•8m ago•0 comments

Do Commodities Get Cheaper over Time?

https://www.construction-physics.com/p/do-commodities-get-cheaper-over-time
1•JumpCrisscross•8m ago•0 comments

You Guys Lied to Me

https://old.reddit.com/r/homelab/comments/1qjrs8y/you_guys_lied_to_me/
1•speckx•10m ago•1 comments

YaCy: P2P Search Engine

https://github.com/yacy/yacy_search_server
1•computersuck•10m ago•0 comments

Rust 1.93.0

https://blog.rust-lang.org/2026/01/22/Rust-1.93.0/
1•HieronymusBosch•10m ago•0 comments

TikTok is still a danger. America no longer cares

https://www.economist.com/business/2026/01/21/tiktok-is-still-a-danger-america-no-longer-cares
2•bookofjoe•17m ago•2 comments

The rapid evolution of Software Engineer's role

https://dev.ribic.ba/the-rapid-evolution-of-software-engineer-s-role
2•ribice•17m ago•1 comments

Why AI Keeps Falling for Prompt Injection Attacks

https://www.schneier.com/blog/archives/2026/01/why-ai-keeps-falling-for-prompt-injection-attacks....
2•speckx•17m ago•0 comments

Disruption with Some GitHub Services

https://www.githubstatus.com/incidents/cqb5hcy0gx18
2•enescakir•18m ago•0 comments

AInxiety

https://pcmaffey.com/ainxiety-1/
1•pcmaffey•19m ago•0 comments

I Still Write Code as an Engineering Manager

https://terriblesoftware.org/2026/01/22/why-i-still-write-code-as-an-engineering-manager/
1•matheusml•20m ago•0 comments

Founders can now chat with their Git history

1•inferno22•20m ago•0 comments

Results from the 2025 Go Developer Survey

https://go.dev/blog/survey2025
1•blenderob•20m ago•0 comments

India Is Electrifying Faster Than China Using Cheap Green Tech

https://www.bloomberg.com/news/articles/2026-01-22/india-is-electrifying-faster-than-china-using-...
2•alephnerd•23m ago•3 comments

Gore Verbinski Discusses Why CGI No Longer Looks Good

https://butwhytho.net/2025/11/gore-verbinski-good-luck-have-fun-dont-die/
2•cainxinth•23m ago•0 comments