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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/

American Prairie Grows Again with 2k+ Acres of Critical Wetland Habitat

https://americanprairie.org/the-latest/american-prairie-grow-again-with-2k-acres-of-critical-wetl...
1•gametorch•41s ago•0 comments

Emergent Quantization from a Dynamic Vacuum

https://journals.aps.org/prresearch/abstract/10.1103/l8y7-r3rm
1•Rover222•11m ago•2 comments

High-throughput phenomics of global ant biodiversity

https://www.nature.com/articles/s41592-026-03005-0
1•bookofjoe•11m ago•0 comments

The Deadliest Animals

https://ourworldindata.org/deadliest-animals
1•gmays•12m ago•0 comments

Fast and Powerful Code Editor

https://lap.dev/lapce/
2•arthurz•14m ago•1 comments

The greatest unsolved problem in computer science

https://www.youtube.com/watch?v=x36UmiSiEzc
1•ArturoNereu•17m ago•0 comments

China Deploys 30k-Ton Liaowang-1 "Floating Supercomputer" to Gulf of Oman

https://defencesecurityasia.com/en/china-liaowang-1-spy-ship-gulf-of-oman-us-israel-iran-war-surv...
3•swed420•18m ago•1 comments

Family of Tumbler Ridge shooting victim suing OpenAI

https://www.cbc.ca/news/canada/british-columbia/openai-sued-tumbler-ridge-victim-9.7121635
2•stygiansonic•19m ago•0 comments

Show HN: Open-source, model-agnostic alternative to Claude Code Review

https://github.com/kodustech/kodus-ai
3•edvaldodfreitas•22m ago•0 comments

Trump cancels sanctions against countries buying Russian oil

https://unn.ua/en/news/trump-cancels-sanctions-against-countries-buying-russian-oil
2•testing22321•23m ago•0 comments

Show HN: CLI for Atlassian

https://github.com/chinmaymk/acli
3•_chinmaymk•24m ago•0 comments

The Custodian Shift

https://igorschwarzmann.com/strategyasprotocol/custodian-shift/
2•doener•24m ago•0 comments

How to Get Free Email for Your Custom Domain

https://timleland.com/how-to-get-free-email-for-your-custom-domain/
2•TimLeland•25m ago•0 comments

Corporateapology.com – Accountability at Scale

https://corporateapology.com
1•drawbars•28m ago•1 comments

Karpathy: Autoresearch

https://github.com/karpathy/autoresearch/blob/master/README.md
3•champagnepapi•30m ago•1 comments

The CIA's attempt to make Havana Syndrome disappear

https://theins.press/en/inv/290088
2•FergusArgyll•30m ago•0 comments

Against the Orthogonality Thesis Part 2 – Alignment

https://jonasmoman.substack.com/p/against-the-orthogonality-thesis-f99
3•paulpauper•35m ago•0 comments

Finding Remote Work as a Drone Operator

https://nathankyoung.substack.com/p/finding-remote-work-as-a-drone-operator
2•paulpauper•35m ago•0 comments

Cybertruck in Autopilot mode tried to drive off Houston bridge, suit says

https://www.chron.com/culture/article/cybertruck-houston-lawsuit-21965298.php
2•zzzeek•36m ago•0 comments

LLM Integrity During Inference in Llama.cpp

https://bednarskiwsieci.pl/en/blog/integrity-llm-inference-tampering/
1•piotrbednarsalt•39m ago•1 comments

The iPhone 17e

https://daringfireball.net/2026/03/the_iphone_17e
1•chmaynard•41m ago•0 comments

The Requirements Layer Your AI System Is Missing

https://kiln.tech/blog/requirements_layer_your_ai_system_is_missing
1•samfierro•41m ago•1 comments

Simulating Catalog and Table Conflicts in Iceberg

https://cdouglas.github.io/posts/2026/03/catalog
1•eatonphil•45m ago•0 comments

Run PostgreSQL on AKS High‑Performance, Flexible, Cloud Native Postgres on Azure [video]

https://www.youtube.com/watch?v=KEApG5twaA4
1•RaouleDuke•45m ago•0 comments

Show HN: OxiGDAL – A pure Rust replacement for GDAL with zero C/C++ dependencies

https://github.com/cool-japan/oxigdal
2•kitasan•48m ago•0 comments

Newcomb's Paradox Needs a Demon

https://samestep.com/blog/newcombs-paradox/
1•sestep•48m ago•0 comments

ClaudeAI's Review of "Do Androids Dream of Electric Sheep"

https://old.reddit.com/r/ClaudeAI/comments/1rnio7s/had_claude_read_do_androids_dream_of_electric/
2•lisper•50m ago•0 comments

GPS jamming: The invisible battle in the Middle East

https://www.bbc.com/news/articles/c3ewwlx9e1xo
2•1659447091•50m ago•0 comments

Moonforge: A Yocto-Based Linux OS

https://www.igalia.com/2026/03/09/Introducing-Moonforge-A-Yocto-Based-Linux-OS.html
2•microflash•51m ago•0 comments

Lucid Dreaming (1995)

https://www.aphextwin.nu/learn/98336584377199.shtml
1•carlos-menezes•53m ago•0 comments