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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

How HTML Changes in ePub

https://htmhell.dev/adventcalendar/2025/11/
1•robin_reala•1m ago•0 comments

Show HN: Video Frame Extractor – Extract frames in the browser

https://www.blurimageonline.com/video-frame-extractor
1•teroquyiqwu•1m ago•0 comments

Dedicated GPU Server from Hetzner

https://www.hetzner.com/dedicated-rootserver/matrix-gpu/
2•Scotrix•6m ago•1 comments

The ivory tower of Platform Engineering

https://platformengineering.org/blog/the-ivory-tower-of-platform-engineering
1•gpi•7m ago•0 comments

On-Prem Backup Still Makes Sense

https://medium.com/@justinwang001/why-on-prem-backup-still-makes-sense-5723504c2d7b
3•jerrywjh•9m ago•0 comments

Exploration of basic human values in 38 million obituaries over 30 years [pdf]

https://moralitylab.bc.edu/wp-content/uploads/sites/192/2025/09/markowitz-et-al-an-exploration-of...
2•sipofwater•16m ago•1 comments

LLM-Powered Relevance Assessment for Pinterest Search

https://medium.com/pinterest-engineering/llm-powered-relevance-assessment-for-pinterest-search-b8...
1•tsenturk•20m ago•0 comments

The Cost of a Closure in C

https://thephd.dev/the-cost-of-a-closure-in-c-c2y
1•ingve•21m ago•0 comments

We are in the era of Science Slop (and it's exciting)

https://superposer.substack.com/p/we-are-in-the-era-of-science-slop
2•stared•24m ago•0 comments

Show HN: DailyMe–I built an RPG task tracker for ADHD son build self-disclpline

https://dailyme.app/
3•nananono•25m ago•1 comments

Beyond the FGC-9: How the Urutau Redefines the Global 3D-Printed Firearms

https://gnet-research.org/2025/01/08/beyond-the-fgc-9-how-the-urutau-redefines-the-global-3d-prin...
1•f1shy•30m ago•0 comments

Project Chrono an Open Source Multi-Physics Simulation Engine

https://projectchrono.org/
3•lorenzohess•35m ago•0 comments

What I Look for in AI-Assisted PRs

https://benjamincongdon.me/blog/2025/12/10/What-I-Look-For-in-AI-Assisted-PRs/
1•ingve•35m ago•0 comments

Show HN: Browser-based encryption tools with zero server-side processing

https://ikrypt.com/
1•digi_wares•36m ago•0 comments

Show HN: RequestHunt – Find real feature requests from Reddit, X, and HN

https://www.requesthunt.com/
2•Zephyr0x•38m ago•0 comments

You Cannot Fix Rotten Soil

https://alifeengineered.substack.com/p/you-cannot-fix-rotten-soil
3•gpi•42m ago•1 comments

Pick a door. I'll judge you

https://nathanpmyoung.substack.com/p/pick-a-door-ill-judge-you
4•mparramon•42m ago•0 comments

Jetbrains Fixes 20 Year Old Feature Request

https://youtrack.jetbrains.com/issue/CPP-4141/Make-CLion-available-as-IntelliJ-plugin
2•krisgenre•43m ago•0 comments

A new way to see and control your algorithm

https://about.instagram.com/blog/announcements/reels-algorithm-control
1•ChrisArchitect•43m ago•0 comments

Handling Email in Emacs

https://stuff.sigvaldason.com/email.html
1•harryday•44m ago•1 comments

Sea urchin species on brink of extinction after marine pandemic

https://www.theguardian.com/environment/2025/dec/11/sea-urchin-species-on-brink-of-extinction-aft...
2•mykowebhn•44m ago•0 comments

Threshold

https://studium.dev/notes/threshold
2•jerlendds•50m ago•0 comments

Microfeatures I'd like to see in more languages

https://buttondown.com/hillelwayne/archive/microfeatures-id-like-to-see-in-more-languages/
4•goranmoomin•51m ago•0 comments

US Navy pledges $448M to test if Palantir is seaworthy

https://www.theregister.com/2025/12/10/palantir_navy_448_million_contract/
2•rjzzleep•51m ago•1 comments

Ask HN: What hard problems are still underexplored?

3•brihati•53m ago•1 comments

Storm-search: VS Code extension with global search that is useful

https://github.com/zigcBenx/storm-search
1•thunderbong•53m ago•0 comments

AI Product Retention Crisis: Why Users Aren't Staying

https://medium.com/@gp2030/ai-product-retention-crisis-why-users-arent-staying-1ecb781ac5c2
2•light_triad•55m ago•0 comments

There's a Database of Startup Ideas Here

6•suhaspatil101•57m ago•0 comments

JSON to Video

https://jsontovideo.org/
1•vvalvyvv•1h ago•0 comments

Xplora – A Smartwatch Designed for Kids

https://xplora.dk/
1•MrJagil•1h ago•0 comments