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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/

OB-GYN pay overhaul spells changes for maternal care

https://www.axios.com/2026/07/13/ob-gyn-pay-overhaul-changes-maternal-care
1•brandonb•21s ago•0 comments

The Efficiency Gains from Mergers

https://nicholasdecker.substack.com/p/the-efficiency-gains-from-mergers
1•surprisetalk•36s ago•0 comments

The Prompt Stops Mattering When You Leave the Room

https://x.com/i/article/2076675078620909569
1•deepakguptacse•1m ago•0 comments

Rewriting the Accreditation Playbook

https://pen.org/rewriting-the-accreditation-playbook/
1•hn_acker•1m ago•0 comments

AI-authored motion graphics with a compiler in the loop

https://samsonaligba.com/video-compiler-for-agents-and-humans
1•sa_gdi•1m ago•0 comments

I Built an AI System That Codes, Runs and Improves Itself

https://fatihkoc.net/posts/ai-system-that-improves-itself/
1•fatihkocnet•3m ago•0 comments

The Meridian of Her Greatness (2017)

https://samzdat.com/2017/06/01/the-meridian-of-her-greatness/
1•jxmorris12•4m ago•0 comments

Show HN: Stinger – Catch secret-stealing activity via local traps on macOS/Linux

https://github.com/0x4D31/stinger
1•0x4d31•4m ago•0 comments

Settling a 2006 conjecture on Huffman codes

https://iczelia.net/blog/settling-a-2006-conjecture-on-huffman-codes/
1•speckx•4m ago•0 comments

Harmonic, client-side additive models with uncertainty bands

https://chrismac860.github.io/harmonic/
2•cmackle•5m ago•0 comments

CortexWP AI: WordPress Agentic system for debugging and development

https://cortexwp.ai/blog/cortexwp-ai-wordpress-agent
1•mdrajinsharwar•5m ago•0 comments

The Cell Phone Novel Craze of Early 2000s Japan Did Not Destroy Literature

https://lithub.com/the-cell-phone-novel-craze-of-early-2000s-japan-did-not-in-fact-destroy-litera...
1•theanonymousone•8m ago•0 comments

Why Am I Left-Handed?

https://www.quantamagazine.org/why-am-i-left-handed-20260713/
2•Brajeshwar•8m ago•0 comments

Spaceflight is hard on the heart, yet artificial ones grow better in space

https://www.space.com/space-exploration/human-spaceflight/spaceflight-is-hard-on-the-heart-yet-ar...
1•marc__1•9m ago•0 comments

SynapseOS – Where the Kernel Thinks

https://github.com/velle999/SYNAPSE
1•vellesinclair•9m ago•0 comments

Reading Well

https://map.simonsarris.com/p/reading-well
1•simonsarris•10m ago•0 comments

The AI Safety Paradox

https://pointersgonewild.com/2026-07-03-the-ai-safety-paradox/
1•ibobev•12m ago•0 comments

Show HN: FDrive – Mount Anything as a FS (SFTP, S3, FTP, IPFS, ...)

https://github.com/mickael-kerjean/fdrive
1•mickael-kerjean•12m ago•0 comments

Building a Clang Back End and Porting Doom to My Custom Bytecode VM

https://pointersgonewild.com/2026-07-07-building-a-clang-backend-and-porting-doom-to-my-custom-by...
1•ibobev•12m ago•0 comments

Intuitive Quantum Electrodynamics

https://www.forwardscattering.org/page/Intuitive%20Quantum%20Electrodynamics
1•ibobev•13m ago•0 comments

Kitty Chases the Mouse

https://lwn.net/Articles/1080821/
2•leephillips•13m ago•1 comments

Real GDP growth by state: First quarter 2026

https://fredblog.stlouisfed.org/2026/07/real-gdp-growth-by-state-first-quarter-2026/
1•loughnane•14m ago•0 comments

Y Combinator Paxel

https://paxel.ycombinator.com/
2•flippant•18m ago•1 comments

Show HN: A DNA motif/feature scanner on a single Cloudflare Worker, in Rust

https://github.com/dhruvkjain/argus-ligand
1•dhruvkjain•18m ago•0 comments

LAPD lets contract with surveillance giant Flock expire

https://techcrunch.com/2026/07/13/lapd-lets-contract-with-surveillance-giant-flock-expire-citing-...
4•forks•18m ago•1 comments

CATL Debuts First Field-Validated Sodium-Ion Bess

https://www.catl.com/en/news/6861.html
1•ksec•18m ago•1 comments

Show HN: A developer tool guide for AI coding agents (900 tools and counting)

https://zairalabs.ai/guide/
1•harkdif•20m ago•3 comments

Show HN: WaitToUnlock – Lock yourself out of iOS ScreenTime

https://waittounlock.com/
4•shorekey•22m ago•0 comments

Show HN: Yes-Brainer – A council of LLMs that debate in the browser, BYOK

https://yesbrainer.ai/
1•trekhleb•22m ago•1 comments

The Verge

https://www.theverge.com
1•MO_Emara•22m ago•0 comments