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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/

Unhealthiest Foods on the Planet, According to Science

https://techfixated.com/100-unhealthiest-foods-on-the-planet-according-to-science/
1•benlarweh•57s ago•0 comments

Show HN: Postgres data cluster by meaning (semantic search and visualization)

https://github.com/varmabudharaju/pgsemantic
1•varmabudharaju•1m ago•0 comments

Game Pirates Beat Denuvo with Hypervisor Bypasses

https://torrentfreak.com/game-pirates-beat-denuvo-with-hypervisor-bypasses-irdeto-promises-counte...
1•ls612•3m ago•0 comments

NASA plans to send a nuclear-powered spacecraft to Mars in 2028

https://www.science.org/content/article/nasa-plans-send-nuclear-powered-spacecraft-mars-2028
1•mpweiher•7m ago•0 comments

Why Some Criticisms Matter More Than Others

https://gnupg.org/blog/20260320-some-criticism-matter.html
1•upofadown•8m ago•0 comments

Karakuri Mechanical Art

https://karakurist.jp/
2•marukodo•10m ago•0 comments

Show HN: Tama96 – A virtual pet for your desktop, terminal, or AI agent

https://www.tama96.com/
2•siegers•10m ago•0 comments

Clawbernetes. Infra to deploy agents fast with enterprise grade features

https://clawbernetes.org
1•augustinczw•11m ago•1 comments

Dial9: A Flight Recorder for Tokio

https://tokio.rs/blog/2026-03-18-dial9
1•lukastyrychtr•14m ago•0 comments

French Senate votes to block social media access for under-15s

https://www.lbc.co.uk/article/france-social-media-ban-vote-5HjdX8R_2/
3•austinallegro•14m ago•1 comments

Gest

https://gest.aaronmallen.dev/
2•aaronmallen•14m ago•0 comments

Why Your AI Agent Shouldn't Define Words

https://wordorb.ai/blog/why-your-ai-agent-shouldnt-define-words
1•nicoletterankin•14m ago•0 comments

Data centers' heat exhaust is not raising the land temperature around them

https://blog.andymasley.com/p/data-centers-heat-exhaust-is-not
2•loeg•15m ago•0 comments

Caltech Researchers Claim Compression of High-Fidelity AI Models

https://www.wsj.com/cio-journal/caltech-researchers-claim-radical-compression-of-high-fidelity-ai...
1•ghshephard•15m ago•0 comments

Feat: Open-Source Claude Code

https://github.com/anthropics/claude-code/pull/41447
1•brenoRibeiro706•16m ago•1 comments

Allbirds, Once Valued at $4B, Just Sold Its Assets for Next to Nothing

https://www.wsj.com/business/retail/allbirds-the-tech-bro-favorite-once-valued-at-4-billion-just-...
3•bookofjoe•16m ago•1 comments

Show HN: A tool to solve the Agent Supply Chain pandora box

https://github.com/microsoft/apm
1•dmppch•17m ago•0 comments

Maze Algorithms

https://www.astrolog.org/labyrnth/algrithm.htm
1•marukodo•18m ago•0 comments

Don't Call It a Moat

https://99d.substack.com/p/dont-call-it-a-moat
1•herbertl•22m ago•0 comments

A satellite-smashing chain reaction could spiral out of control

https://www.theguardian.com/science/ng-interactive/2026/mar/31/this-feels-fragile-how-a-satellite...
1•andrewshadura•22m ago•0 comments

LinkedIn uses 65GB of RAM with 7 tabs opened

4•daniele_dll•25m ago•2 comments

Introducing Simple Mode

https://docs.eventsourcingdb.io/blog/2026/04/01/introducing-simple-mode/
3•goloroden•26m ago•0 comments

TerraLenses – Explore Countries – cultures, landscapes, facts, and comparisons

https://terralenses.com/
2•Badassbob•27m ago•1 comments

Make your own GitHub health indicator and LED lamp

https://github.com/davenicoll/usermod-github-health
1•binarysneaker•29m ago•1 comments

Wastrelly Wabbits

https://wingolog.org/archives/2026/03/31/wastrelly-wabbits
1•davexunit•29m ago•0 comments

How we chose Positron's Python type checker

https://positron.posit.co/blog/posts/2026-03-31-python-type-checkers/
2•nomial•30m ago•0 comments

Logan Bartlett's Reflections on the State of the Software and AI Market

https://twitter.com/loganbartlett/status/2037638091671035994
1•nadis•31m ago•0 comments

Show HN: I'm making it much easier to sell your side project / small business

https://weensy.xyz
2•mjhcodes•31m ago•0 comments

Forgotten Italian CPU – The Genesys B52 MMX (2021)

https://www.cpushack.com/2021/08/12/forgotten-italian-cpu-the-genesys-b52-mmx/
2•WaluigiBSOD•31m ago•0 comments

Show HN: Virtui – TUI session automation and recording for agents

https://github.com/honeybadge-labs/virtui
3•rotemtam•32m ago•0 comments