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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

Netflix 'plans to switch to all-cash offer to seal $83B Warner Bros deal'

https://www.theguardian.com/film/2026/jan/14/netflix-plans-to-switch-to-all-cash-offer-to-seal-wa...
1•beardyw•2m ago•0 comments

Software Development and Modeling in the Age of Artificial Intelligence

https://download.ssrn.com/2025/12/9/5881104.pdf?response-content-disposition=inline&X-Amz-Securit...
1•ahoibakk•3m ago•0 comments

Senate passes a bill that would let nonconsensual deepfake victims sue

https://www.theverge.com/news/861531/defiance-act-senate-passage-deepfakes-grok
1•smurda•5m ago•0 comments

Does anyone know who currently owns Graphic (formerly Autodesk Graphic)?

https://graphic.com
1•mattkevan•7m ago•1 comments

Debunking the 'Three Pillars of Observability' Myth (2021)

https://softwareengineeringdaily.com/2021/02/04/debunking-the-three-pillars-of-observability-myth/
1•tosh•7m ago•0 comments

How to write a good spec for AI agents

https://addyosmani.com/blog/good-spec/
2•cdrnsf•7m ago•0 comments

How to get banned from Facebook in one simple step

https://nibblestew.blogspot.com/2026/01/how-to-get-banned-from-facebook-in-one.html
1•ibobev•10m ago•0 comments

You Need a Kitchen Slide Rule

https://entropicthoughts.com/kitchen-slide-rule
1•ibobev•10m ago•0 comments

Show HN: DailySpace, Android app for exploring space photos and rocket launches

https://play.google.com/store/apps/details?id=com.daily.space&hl=en_US
2•DailySpace•10m ago•1 comments

Parallel Primitives for Multi-Agent Workflows

https://fergusfinn.com/blog/parallel-primitives-blog/
1•mezark•11m ago•0 comments

No Bloom? No Problem: Glowing Stuff Without Post Effects

https://www.patreon.com/posts/no-bloom-no-post-53965598
1•ibobev•11m ago•0 comments

Servo 2025 Stats

https://blogs.igalia.com/mrego/servo-2025-stats/
2•todsacerdoti•12m ago•0 comments

Event Sourcing with GenesisDB CE Now Available on Uberspace

https://lab.uberspace.de/guide_genesis-db/
1•patriceckhart•13m ago•0 comments

Unemployed almost a year after graduating MIT – a rant

3•TimGubth•17m ago•2 comments

Build Your OT Toolbox: It's Dangerous to Go Alone, So Take These Tools

https://www.emberot.com/resources/blog/build-your-ot-toolbox/
1•TheWiggles•17m ago•0 comments

Ask HN: Did Glassdoor figure out your identity?

1•penguin_booze•19m ago•0 comments

Show HN: Hirebetter.io – AI tools to reduce manual recruiter work

https://hirebetter.io
1•tomgreef•20m ago•0 comments

Show HN: Anti for You

https://github.com/da-x/anti-for-you
1•da-x•21m ago•0 comments

Donald Trump, Would-Be Price Controller

https://paulkrugman.substack.com/p/donald-trump-would-be-price-controller
2•rbanffy•23m ago•0 comments

Lies, Damned Lies and Proofs: Formal Methods Are Not Slopless

https://www.lesswrong.com/posts/rhAPh3YzhPoBNpgHg/lies-damned-lies-and-proofs-formal-methods-are-...
3•OgsyedIE•25m ago•0 comments

Show HN: Plane Clock – Displays plane corresponding to hour

https://antoinemopa.github.io/plane_clock/
1•antoineMoPa•28m ago•0 comments

EBPF.party

https://ebpf.party
4•todsacerdoti•30m ago•0 comments

Show HN: Burnboard – Track and compare your AI coding assistant usage

https://burnboard.dev
1•davekiss•31m ago•0 comments

Java – Project Valhalla: Prototyping null checks

https://mail.openjdk.org/pipermail/valhalla-spec-experts/2026-January/002554.html
2•tomaytotomato•33m ago•0 comments

Notes on Skill.md vs. MCP

https://taoofmac.com/space/notes/2026/01/14/0830
1•rcarmo•37m ago•0 comments

Show HN: Claude CodePro – Professional Development Environment for Claude Code

https://github.com/maxritter/claude-codepro
1•rittermax•38m ago•0 comments

Reversing YouTube's "Most Replayed" Graph

https://priyavr.at/blog/reversing-most-replayed/
1•prvt•38m ago•1 comments

Show HN: MCP-add` a CLI to add your MCP server to various clients with ease

https://github.com/paoloricciuti/mcp-add
1•pablopang•39m ago•0 comments

UK Officials could face US entry ban over Twitter policy

https://parliamentnews.co.uk/uk-officials-could-face-us-entry-ban-over-x-policy
3•OgsyedIE•39m ago•0 comments

Peter Girnus: "Last quarter I rolled out Microsoft Copilot to 4k employees."

https://twitter.com/i/status/1999124665801880032
2•bthallplz•44m ago•0 comments