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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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: Availability Tracker – A Simple Way to Track Items

https://availabilitytracker.app/
1•jkferland•1m ago•0 comments

History of T

https://paulgraham.com/thist.html
1•tosh•3m ago•0 comments

Show HN: Window Switcher – Better same-app window switching for macOS

https://github.com/hanguokai/window-switcher
1•hanguokai•3m ago•0 comments

Oura Ring 5 Review

https://www.theguardian.com/technology/2026/jun/30/oura-ring-5-review-smart-ring-health-tracking
1•tosh•3m ago•0 comments

Show HN: Escalate – human as a service for your agent

https://escalateto.me/landing
1•oleh_vell•4m ago•0 comments

Webhookvault

https://webhookvault.onrender.com/login
1•hydra2297•4m ago•0 comments

Belgian politicians would rather risk treason charges than trust engineers

https://mikhailian.mova.org/posts/325-belgian-politicians-would-rather-risk-treason-charges-than-...
1•sam_lowry_•5m ago•0 comments

Stop the Tester's Inferiority Complex: QA and Dev Are Equals

https://medium.com/@vincent.ferreira/stop-the-testers-inferiority-complex-qa-and-dev-are-equals-9...
1•vincenfer•6m ago•0 comments

The Scanline Sweeper: A Glyph Rendering Algorithm [video]

https://www.youtube.com/watch?v=B9bztU1sTFA
1•alan665•6m ago•0 comments

Vantor's Open Satellite Feed

https://tech.marksblogg.com/vantor-satellite-imagery.html
1•marklit•6m ago•0 comments

Apple acquires Play, award-winning SwiftUI prototyping tool

https://www.cultofmac.com/news/apple-acquires-play-swiftui-app
1•terelueli•10m ago•0 comments

Show HN: WtfisMyRepo – Use Claude to understand most complex codebases in mins

https://github.com/nandnijaiswal/wtfismyrepo
2•udit_50•10m ago•1 comments

Beyond Denial How Oil Execs Shaped a Landmark Climate Study

https://www.propublica.org/article/wedges-climate-research-bp-fossil-fuel-princeton
1•_____k•12m ago•0 comments

Porting half life 2 to the browser

https://www.slqnt.dev/blog/hl2-in-web
1•QuantumNomad_•12m ago•0 comments

Show HN: Classic Minesweeper

https://guokai.dev/minesweeper/
1•hanguokai•13m ago•0 comments

China's Geely to Ship First Lotus EVs to Canada

https://www.reuters.com/world/asia-pacific/chinas-geely-ship-first-lotus-evs-canada-july-under-ca...
1•Alien1Being•19m ago•0 comments

Show HN: Mocca – A Mac email client powered by local AI

https://mocca.run/
1•brighbun•20m ago•0 comments

A Framework for Representing Knowledge – Marvin Minsky (1975) [pdf]

https://courses.media.mit.edu/2004spring/mas966/Minsky%201974%20Framework%20for%20knowledge.pdf
1•the-mitr•21m ago•0 comments

Actionable Security is Missing on the EU Horizon

https://mikhailian.mova.org/posts/326-actionable-security-is-missing-on-the-eu-horizon.html
2•sam_lowry_•21m ago•1 comments

PDP-1 Replica: The PiDP-1

https://obsolescence.dev/pdp1.html
1•kqr•21m ago•0 comments

Prime Is Not Youth, Money, or Status. It Is Something More Human

https://kanyilmaz.me/2026/03/28/prime-is-1-to-4.html
1•demiculus•21m ago•0 comments

Anthropic embedded spyware in Claude Code – and attempted to hide it from you

https://www.reddit.com/r/ClaudeCode/s/Z690c1Y9Zk
3•cromka•23m ago•0 comments

Australia's Solar Sharer: free electricity 3 hours/day starting July 1

https://www.abc.net.au/news/2026-06-29/free-electricity-solar-sharer-scheme/105999242
1•indynz•25m ago•0 comments

I built a one-time-payment alternative to subscription cloud movers

https://www.gtransfer.app
1•localappointmnt•28m ago•0 comments

Towards Understandable Software

https://gracefulliberty.com/articles/towards-understandable-software/
1•birdculture•28m ago•0 comments

Google's Whitepaper on SDLC in the Agentic Era

https://www.kaggle.com/whitepaper-the-new-SDLC-with-vibe-coding
1•shahargl•30m ago•0 comments

Good article about local LLM on MacBook Air

https://www.xda-developers.com/ollama-new-mlx-engine-local-llm-mac-twice-fast/
1•taintech•30m ago•0 comments

Show HN: Smug – single binary, dependency free session manager for tmux

https://github.com/ivaaaan/smug
1•iillexial•31m ago•0 comments

Anthropic embedded spyware in Claude Code – and attempted to hide it from you

https://old.reddit.com/r/ClaudeAI/comments/1ujila1/anthropic_embedded_spyware_in_claude_code_and/
2•theanonymousone•31m ago•0 comments

AMD Stretches Server DRAM with Flash Extended Memory

https://www.nextplatform.com/store/2026/06/29/amd-stretches-server-dram-with-flash-extended-memor...
1•rbanffy•35m ago•0 comments