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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/

12 years later, Hidden Path releases first DLC for Defense Grid 2

https://store.steampowered.com/app/1080920/Defense_Grid_2__Aftermath/
1•HardwareLust•2m ago•1 comments

Idea Killshot: stress-test your startup idea before the market does

https://hnshah.github.io/idea-killshot/
1•oatis-ai•3m ago•0 comments

Lingua Clanka

https://linguaclanka.com
1•jacques_chester•7m ago•0 comments

Dataset from Anthropic interviewing people on what's AI doing in life

https://gist.github.com/priyanshujain/6c4c06086280f1db65db4416581cc144
1•priyanshujain•9m ago•1 comments

Mave – Improve focus. Reduce stress. Feel calm

https://www.mavehealth.com
1•gkcgautam•10m ago•0 comments

Mastercard acquiring stablecoin startup BVNK in $1.8B crypto bet

https://www.cnbc.com/2026/03/17/mastercard-acquiring-stablecoin-startup-bvnk-in-crypto-bet.html
1•lxm•11m ago•0 comments

We Have Learned Nothing

https://colossus.com/article/we-have-learned-nothing-startup-pundits/
2•lukestevens•16m ago•0 comments

The SDLC Is Dead

https://boristane.com/blog/the-software-development-lifecycle-is-dead/
2•appwiz•19m ago•1 comments

Confer is bringing foundational AI privacy to Meta

https://confer.to/blog/2026/03/encrypted-meta/
2•justcommenting•20m ago•1 comments

Billy.sh – a local AI coding assistant for the terminal

https://github.com/jd4rider/billy-app
1•jd4rider•20m ago•0 comments

Upgrading to Kubernetes 1.35?

https://randomwrites.com/foundations/02-Cgroups-Deep-Dive
1•mutahirs•25m ago•0 comments

US Postal Service expects to run out of cash in a year

https://abc7.com/post/us-postal-service-expects-run-cash-year-help-congress-postmaster-says/18730...
2•lxm•29m ago•1 comments

Why Tech Giants Are Ditching the Power Grid

https://www.nytimes.com/interactive/2026/03/18/business/energy-environment/data-center-energy-gas...
1•mmooss•30m ago•0 comments

I Choose Ruby on Rails in the AI Coding Era

https://jessewaites.com/blog/post/why-i-choose-ruby-on-rails-in-the-ai-coding-era/
1•cylo•32m ago•0 comments

The Robotic Tortoise and the Robotic Hare

https://tomtunguz.com/local-vs-cloud-speed/
1•dataminer•33m ago•0 comments

One Hundred Years in the U.S. Stock Markets

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6438198
1•salkahfi•36m ago•0 comments

US national debt surges past $39T just weeks into war in Iran

https://apnews.com/article/us-national-deficit-hits-39-million-6ff73495bae701b5c009d3da5515ca3a
4•SilverElfin•36m ago•6 comments

I built a memory AI that talks and learns

https://play.google.com/store/apps/details?id=com.n3xg3n.chatbot&hl=en_US
1•bennyv1211•38m ago•0 comments

Show HN: We built an AI judge for a live hackathon, then red-teamed it

https://basicscandal.github.io/arbiter/
1•theoradical•38m ago•0 comments

Next-Generation Water Satellite Maps Seafloor from Space

https://www.jpl.nasa.gov/news/next-generation-water-satellite-maps-seafloor-from-space/
1•thunderbong•44m ago•0 comments

A sufficiently detailed spec is code

https://haskellforall.com/2026/03/a-sufficiently-detailed-spec-is-code
2•signa11•46m ago•0 comments

Cook: A simple CLI for orchestrating Claude Code

https://rjcorwin.github.io/cook/
14•staticvar•49m ago•2 comments

Forest loss can make watersheds 'leakier,' global study suggests

https://phys.org/news/2026-02-forest-loss-watersheds-leakier-global.html
2•PaulHoule•53m ago•0 comments

Afroman prevails in defamation trial over songs about police raid on his home

https://www.washingtonpost.com/national-security/2026/03/18/afroman-lawsuit-deputies-raid-ohio/
3•busymom0•55m ago•1 comments

Ghost Leg Lottery

https://en.wikipedia.org/wiki/Ghost_leg
1•tdeck•56m ago•0 comments

Strategic Leadership Is Lacking, Not Trust

https://garrickvanburen.com/strategic-leadership-is-lacking-not-trust/
1•garrickvanburen•56m ago•0 comments

China's aluminium smelters embark on green long march

https://www.ft.com/content/1e6e531f-b383-4404-9acf-79db8d9c6c00
1•toomuchtodo•1h ago•1 comments

Show HN: Fitness MCP

https://getfast.ai/claude-connector
5•tmulc18•1h ago•0 comments

Genome modelling and design across all domains of life with Evo 2

https://www.nature.com/articles/s41586-026-10176-5
1•salutis•1h ago•0 comments

SumatraPDF 3.6 Released

https://www.sumatrapdfreader.org/docs/Version-history#3-6-2026-03-17
2•clavis•1h ago•0 comments