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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/

Show HN: MAKO – Open protocol for LLM-optimized web content (93% fewer tokens)

https://makospec.vercel.app/en
1•juanisidoro•34s ago•0 comments

Show HN: Cai – AI actions on your clipboard, runs locally (macOS, open source)

https://github.com/soyasis/cai
1•soyasis•2m ago•0 comments

Show HN: Kremis – Deterministic memory graph for AI agents (Rust)

https://github.com/M2Dr3g0n/kremis
1•M2Dr3g0n•3m ago•0 comments

Instagram boss defends app in trial over alleged harms to kids

https://www.latimes.com/california/story/2026-02-11/instagram-adam-mosseri-social-media-lawsuit-t...
1•1vuio0pswjnm7•4m ago•0 comments

Java.evolved: Java has evolved. Your code can too

https://javaevolved.github.io
2•jongalloway2•7m ago•0 comments

Vibe coding broke the Ballmer Peak

https://www.adriankrebs.ch/blog/the-new-ballmer-peak/
1•hubraumhugo•7m ago•0 comments

Quiet: A private, P2P alternative to Slack and Discord built on Tor and IPFS

https://tryquiet.org/index.html
1•hliyan•7m ago•0 comments

Many consumer electronics manufacturers will bankrupt due to AI memory crisis

https://www.pcgamer.com/hardware/memory/many-consumer-electronics-manufacturers-will-go-bankrupt-...
1•taubek•8m ago•0 comments

EU launches probe into xAI over sexualized images

https://arstechnica.com/tech-policy/2026/02/eu-launches-probe-into-xai-over-sexualized-images/
1•ndsipa_pomu•8m ago•0 comments

Ukraine recaptures 201km² after shutdown of Russian forces' access to Starlink

https://www.france24.com/en/europe/20260216-ukraine-makes-fastest-battlefield-gain-in-2-5-years
1•barredo•8m ago•0 comments

Microsoft Is Auto-Enabling Passkeys in March 2026

https://entra.news/p/microsoft-is-auto-enabling-passkeys
1•vdelitz•9m ago•0 comments

Dutch Lawmakers Advance 36% Capital Gains Tax on Crypto

https://cryptonews.com/news/dutch-lawmakers-advance-36-capital-gains-tax-on-crypto/
1•brodouevencode•9m ago•0 comments

Show HN: CasperAI – A local MCP server for cross-platform engineering context

https://github.com/chose166/CasperAI
1•chose166•10m ago•1 comments

Show HN: Broomy – Open-source app for working with many AI agents at once

https://broomy.org/
1•robotelvis•10m ago•0 comments

Ask HN: How have your security policies kept up with AI?

1•frenchtoast8•11m ago•0 comments

Dutch cops arrest man after sending him confidential files by mistake

https://www.theregister.com/2026/02/16/dutch_cops_breach/
2•tchalla•11m ago•0 comments

The Answer Isn't Macro

https://www.mountaineagle.net/articles/display/?entry_short=the-answer-isnt-macro
1•retrocog•11m ago•0 comments

Lit: Version control where prompts are the source of truth

https://clintonboys.com/projects/lit/
1•mtsolitary•11m ago•0 comments

The oldest known vertebrates had two pairs of eyes

https://newatlas.com/biology/the-worlds-oldest-known-vertebrates-had-two-pairs-of-eyes/
1•Brajeshwar•12m ago•0 comments

5k-year-old bacteria thawed in Romanian ice cave

https://www.popsci.com/science/bacteria-ice-cave-romania/
1•Brajeshwar•12m ago•0 comments

Anthropic's CEO says we're in the 'centaur phase' of software engineering

https://www.businessinsider.com/anthropic-ceo-dario-amodei-centaur-phase-of-software-engineering-...
1•smurda•12m ago•2 comments

AI and the Age of Probabilistic Programming

https://www.abrahammarinperez.com/post/ai-and-the-age-of-probabilistic-programming
1•youknownothing•13m ago•0 comments

Robinhood Ventures Fund I

https://www.sec.gov/ix?doc=/Archives/edgar/data/0002085091/000162828026008313/ck0002085091-202602...
1•sahin•13m ago•0 comments

Show HN: PokeDex++ – I rebuilt my Pokémon app as a web app

https://pokedexplus.shop
1•meimeixoxi•13m ago•0 comments

Show HN: Kanban_P2P – A P2P Kanban board contained in a single HTML file

https://github.com/LukeB42/kanban_p2p
1•LukeB42•13m ago•0 comments

Show HN: A real-time chord identifier web app using the Web MIDI API

https://midi-chord-identifier.backwater.systems/
1•nate-gehringer•14m ago•0 comments

Agentic Email

https://martinfowler.com/bliki/AgenticEmail.html
1•HieronymusBosch•15m ago•0 comments

The Rise and Fall of Scala

https://www.beyondjava.net/newsflash-the-rise-and-fall-of-scala
1•PaulHoule•15m ago•0 comments

AI giants are hoarding memory chips, pushing prices to hyperinflation levels

https://www.latimes.com/business/story/2026-02-17/ai-giants-are-hoarding-memory-chips-pushing-pri...
3•1vuio0pswjnm7•16m ago•0 comments

Show HN: Voicetest – open-source test harness for voice AI agents

2•pldpld•17m ago•0 comments