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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•12mo ago

Comments

trane_project•12mo 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/

The Fallacy of Levelized Cost and the Politics of Demand

https://systemsthinkingcollection.substack.com/p/sustainable-energy
1•InputName•5m ago•0 comments

Google Antigravity 2.0

https://antigravity.google/blog/introducing-google-antigravity-2-0
1•haizhung•6m ago•0 comments

The weird, wild story of humanity's obsession with gold

https://www.economist.com/culture/2026/05/14/the-weird-wild-story-of-humanitys-obsession-with-gold
1•andsoitis•7m ago•0 comments

Watch RT Live Anywhere in the World

https://rtlive.ru
1•dorkel•12m ago•0 comments

Pay Attention – Jon Haidt's Commencement Address at NYU

https://www.theatlantic.com/ideas/2026/05/nyu-jonathan-haidt-commencement-speech/687168/
1•gladuz•12m ago•0 comments

Blood Pumping Mechanism of the Hoof

https://horses.extension.org/blood-pumping-mechanism-of-the-hoof/
1•thunderbong•13m ago•0 comments

Show HN: Agent thread – Share claude code and codex sessions as public links

https://agent-thread.com
1•pixxxel•14m ago•0 comments

Optimizing Your PowerShell $Profile

https://devblogs.microsoft.com/powershell/optimizing-your-profile/
1•ankitg12•14m ago•0 comments

"An (important) message from Infomaniak's founder"

2•netfortius•16m ago•0 comments

Google is rolling out its redesigned Workspace app icons

https://www.theverge.com/tech/932417/google-gmail-docs-cal-sheets-workspace-icon-redesign
1•xanthine•16m ago•1 comments

I Decided to Leave Mistral

https://twitter.com/Briviagra/status/2056975510731698188
2•defly•17m ago•0 comments

A small revolt against bloated software

https://www.f-rello.com/manifesto
1•karstenb•17m ago•0 comments

Proposal: Surface=Laterite

https://wiki.openstreetmap.org/wiki/Proposal:Surface%3Dlaterite
1•altilunium•19m ago•0 comments

Ask HN: Sorry, what Was FiveThirtyEight?

1•gagdiez•19m ago•0 comments

AI will create more jobs than it eliminates from 2028

https://www.gartner.com/en/newsroom/press-releases/2026-05-13-gartner-hr-research-reveals-ai-will...
1•01-_-•19m ago•0 comments

Cerebras Brings Trillion Parameter Inference to Enterprises with Kimi K2.6

https://www.cerebras.ai/blog/cerebras-kimi-k2-Enterprise
2•GaggiX•23m ago•0 comments

MailVault Pro – Own your inbox. Forever

https://mailvaulty.com
1•khaledsabae•24m ago•0 comments

The Expired Domain Trap: Why Legacy SEO Metrics Fail in the Age of AI Agents

https://domainalot.substack.com/p/the-great-domain-illusion-why-legacy
1•sonofmarzipan•25m ago•1 comments

Auto Agent Protocol – an A2A vertical for AI agents buying cars

https://autoagentprotocol.org/
2•yankouskia•26m ago•0 comments

Hack: A through-glass shower karaoke system

https://www.youtube.com/watch?v=pkvA6WhwxnU
1•mattkwan•26m ago•0 comments

The AI Quant Desk for Onchain Finance

https://grid.raster.finance/en/portfolio-analytics
2•Iwan-Raster•28m ago•0 comments

Generations of AI applications: conversational, delegative, and collaborative

https://zknill.io/posts/generations-of-ai-applications/
1•zknill•29m ago•0 comments

Show HN: Shitty AI App Idea Generator

https://shittyaiappidea.com
1•onexey•38m ago•0 comments

Railway GCP Account Suspension Incident Report

https://blog.railway.com/p/incident-report-may-19-2026-gcp-account-outage
3•0xedb•39m ago•0 comments

Andrej Karpathy Joined Anthropic's Pre-Training Team

https://firethering.com/andrej-karpathy-joins-anthropic/
1•steveharing1•41m ago•0 comments

Unitree: Voice‑driven, real‑time arbitrary action generation [video]

https://www.youtube.com/watch?v=B-a8TB8ttII
2•pr337h4m•45m ago•0 comments

Understanding how to run a fleet of agents

1•sermakarevich•47m ago•0 comments

Gemini Omni AI Video Generator

https://gemini-omni-ai.com/
1•gregzeng95•56m ago•0 comments

I built my AI Chief of Staff

https://www.cesarrg.com/how-i-built-my-ai-chief-of-staff/
1•cesarrg•1h ago•0 comments

Notes about reading messages with the Python email packages

https://utcc.utoronto.ca/~cks/space/blog/python/EmailPackagesNotes
2•ankitg12•1h ago•0 comments