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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/

Claude Code Checkpoints

https://github.com/yahnyshc/daedalus
1•maksyyy•1m ago•0 comments

AI and Psi with Paul Werbos (Inventor of Backpropagation) [video]

https://www.youtube.com/watch?v=rMh-snQ1YWU
2•binyu•2m ago•0 comments

Show HN: Codex Workers AI Proxy – Use Workers AI models with Codex CLI

https://github.com/pitzcarraldo/codex-workers-ai-proxy
1•mrnoname•5m ago•1 comments

Show HN: ReverseYC

https://rocketplace.org/reverseyc
2•remarketme•8m ago•0 comments

Show HN: NeZha – An Open-Source Agentic Development Environment (ADE)

https://nezha.hanshutx.com/en/
1•markhan-nping•11m ago•0 comments

Building a 10BASE5 "Thick Ethernet" network (2012)

https://www.mattmillman.com/projects/10base5/
1•accrual•12m ago•0 comments

Show HN: A personality first matchmaking app

https://www.connectwithember.com/
1•willeyy•13m ago•0 comments

LLMs don't want pixels, they want tools

https://www.bobbytables.io/p/the-future-is-apis
1•btables•14m ago•0 comments

Distribution is the only moat AI can't kill

https://dheer.co/only-moat-ai-cant-kill/
1•bushido•17m ago•0 comments

Moltis – A secure persistent personal agent server in Rust

https://moltis.org/
1•rekl•18m ago•0 comments

Regional Variation in the Performance of ASR Models on Croatian and Serbian

https://aclanthology.org/2026.vardial-1.20/
1•taubek•19m ago•0 comments

Trump vows to blockade Strait of Hormuz after talks stumble

https://www.reuters.com/world/asia-pacific/us-iran-talks-pause-now-disagreements-remain-2026-04-11/
5•andyjohnson0•23m ago•1 comments

PostgreSQL Credential Rotation in Production: A Zero-Downtime Runbook

https://www.elydb.com/blog/postgresql-credential-rotation-production
1•thunderbong•24m ago•0 comments

Ask HN: What's your experience with PoW captchas against form spam?

1•pentacent_hq•25m ago•0 comments

A full-featured terminal user interface for hledger plain-text accounting

https://github.com/thesmokinator/hledger-textual
1•willm•27m ago•0 comments

Ask HN: What are all the bad things that AI companies have done which we forgot

1•Imustaskforhelp•28m ago•0 comments

Ask HN: Is Zero Trust Architecture Overkill?

2•devinabox•31m ago•0 comments

Show HN: Formal – Formal verification for AI-generated code using Lean 4

https://github.com/yamafaktory/formal
2•yamafaktory•33m ago•0 comments

Show HN: What's SBTI

https://whatssbti.com/
2•aitooltrek-com•33m ago•0 comments

Show HN: Terminal Style Web Component

https://github.com/spider-hand/terminal-element
1•spider-hand•34m ago•0 comments

Show HN: ApplePy – Embed and Call Swift from Python (Like PyO3, but for Swift)

https://github.com/jagtesh/ApplePy
2•sheepscreek•35m ago•1 comments

Show HN: PrepLists – a directory of 500 prep centers and 3PLs for sellers

https://preplists.com
1•devequijo•35m ago•0 comments

Feature Vomit

https://public.grugnotes.com/keizo/blog/feature-vomit/
3•keizo•36m ago•0 comments

Show HN: Telegram feed reader using DNS TXT records for Iran's Internet shutdown

https://github.com/sartoopjj/thefeed
2•znano•38m ago•1 comments

Trump says US will blockade Strait of Hormuz

https://www.cnn.com/2026/04/12/world/live-news/iran-us-war-talks-trump
8•Tomte•38m ago•4 comments

White Rabbit meets quantum entanglement

https://home.cern/news/news/computing/white-rabbit-meets-quantum-entanglement
1•bookofjoe•40m ago•0 comments

Ask HN: What is the best way to get your first users?

1•Mohd_Umar•40m ago•4 comments

158-year-old home distilling ban ruled unconstitutional

https://www.reuters.com/legal/government/us-appeals-court-declares-158-year-old-home-distilling-b...
2•PessimalDecimal•42m ago•1 comments

Dario Says Continual Learning Is Solved. Is It?

https://twitter.com/tianle_cai/status/2042459055483207818
1•gmays•43m ago•0 comments

Show HN: Kafkaesque – a wire-compatible mock Kafka

https://github.com/dcminter/kafkaesque
1•dcminter•46m ago•1 comments