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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

Autonomous Lost-in-Space Catalog-Based Optical Navigation (Falcon) [pdf]

https://slab.stanford.edu/sites/g/files/sbiybj25201/files/media/file/aiaa_asc_2025-falcon_paper.pdf
1•rbanffy•40s ago•0 comments

Decades-old file security flaws found in Android, Linux, macOS, and Windows

https://www.theregister.com/security/2026/09/24/decades-old-file-security-flaws-found-in-android-...
1•DemiGuru•1m ago•0 comments

Plux trip planner: free, no ad or register obligation, and open source trip

https://plux.nibecarcofeben.com/
1•nibecarcofeben•1m ago•1 comments

Cracking Fortinet's Decryption with Ablation

https://github.com/Ablation-Tool/ablation
1•zellkernel•2m ago•1 comments

Show HN: See your portfolio in your Mac Menubar

https://menubar.snaptra.de/
1•tma•2m ago•0 comments

Show HN: Agency – Manage Agents for Your Robinhood Agentic Account

https://agency.trading/
2•rallies•2m ago•2 comments

African elephants putatively self-medicate with medicinal plants

https://www.nature.com/articles/s41598-026-53610-4
1•geox•4m ago•0 comments

MTV On-Screen Graphics Recreation

https://github.com/m1k1o/mtv-onscreen-graphics
1•m1k1o•6m ago•1 comments

Untamed – A systems-engineering blueprint for technical autonomy

https://thefinancialtimingkey.com/untamed/
1•Sledgehammer_Op•7m ago•0 comments

Government contractor exposed path to immigration records

https://www.theregister.com/security/2026/09/24/government-contractor-exposed-path-to-immigration...
1•DemiGuru•7m ago•0 comments

Apple Opens Apple Music Hall

https://www.apple.com/newsroom/2026/09/apple-opens-apple-music-hall-a-state-of-the-art-live-music...
2•fredley•7m ago•0 comments

GPT-6 Sol is like GPT-5.6 Terra, GPT-6 Luna is like GPT-5.6 Asteroid

https://twitter.com/i/status/2103026209361719406
1•Michelangelo11•9m ago•0 comments

India sees coal remaining power mainstay through 2035-36

https://www.reuters.com/business/energy/india-sees-coal-remaining-power-mainstay-through-2035-36-...
1•alephnerd•10m ago•0 comments

A Little Spark in the Sky

https://thinkingground.net/writing/a-little-spark-in-the-sky
1•zc4242•10m ago•0 comments

"It Was Tragic": Exploring the Impact of a Robot's Shutdown

https://arxiv.org/abs/2509.06934
1•StatsAreFun•10m ago•0 comments

Show HN: Build Python project with poetry and DSCI

http://dsci.sparrowhub.io:8080/file_view/dsci/1f7f688.1790275674/02_answer.md
1•melezhik•10m ago•0 comments

Show HN: I built a seriously detailed free financial planner

https://app.finzot.com/plan/6VXFMte2tRMp81sRKhYgXM/results/net-worth
1•ryan3789437•11m ago•1 comments

US data centres 'are short six NYCs of electricity'

https://www.ft.com/content/f29de45a-3d32-4d9f-90cd-615f7466c1de
2•JumpCrisscross•13m ago•0 comments

Building a GPU in 24 Hours

https://www.outercloud.dev/blogs/gpu/
1•arghunter•14m ago•0 comments

OverfitCheck: Check if your trading backtest is overfit

https://overfitcheck.com
1•aidengandhi•17m ago•0 comments

Easy PDF Export with Links

https://www.figma.com/community/plugin/1637200885821233245/easy-pdf-export-with-links
1•edib•17m ago•0 comments

2.5D parallax interactive battle scene by Opus 5.5

https://www.echohive.ai/experiments/the-golden-ford
2•echohive42•18m ago•0 comments

Massive Parallel Imports in Neo4j Without Deadlock and Lock Contention

https://medium.com/neo4j/massive-parallel-imports-in-neo4j-without-deadlock-and-lock-contention-2...
2•eatonphil•18m ago•0 comments

Postgres SELECT DISTINCT Does Not Scale

https://www.dbos.dev/blog/postgres-select-distinct-does-not-scale
1•KraftyOne•18m ago•0 comments

Watermarking in vLLM

https://vllm.ai/blog/2026-09-24-watermarking-in-vllm
2•eatonphil•18m ago•0 comments

KeePassXC 2.8.0 (Beta 1) released

https://keepassxc.org/blog/2026-09-23-2.8.0-beta1-released/
5•varjolintu•19m ago•0 comments

Show HN: IttyBittyAI – Qwen2.5:0.5B running on a 2017 Asus smartphone

1•spottedmarley•19m ago•0 comments

Anthropic resumes charging for requests blocked by safeguards

https://twitter.com/ClaudeDevs/status/2103170368794185758
4•jeudesprits•19m ago•2 comments

Starbucks to close 250 stores this week

https://finance.yahoo.com/markets/stocks/article/starbucks-to-close-250-stores-this-week-15584602...
1•randycupertino•21m ago•2 comments

OpenAI, Anthropic CEOs urge UN countries to cooperate on AI safety standards

https://slashdot.org/story/26/09/24/0338213/openai-anthropic-ceos-urge-un-countries-to-cooperate-...
1•MilnerRoute•21m ago•0 comments