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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

Fooling Go's X.509 Certificate Verification

https://danielmangum.com/posts/fooling-go-x509-certificate-verification/
1•hasheddan•1m ago•0 comments

A visual guide to Iran's coastline and strategic islands

https://interactive.aljazeera.com/aje/2026/iran-coastline-islands/
1•giuliomagnifico•2m ago•0 comments

Senators Tell Americans That VPN Use Might Subject Them to Domestic Surveillance

https://www.techdirt.com/2026/04/03/senators-ask-tulsi-gabbard-to-tell-americans-that-vpn-use-mig...
2•redeux•2m ago•0 comments

Components of a Coding Agent

https://magazine.sebastianraschka.com/p/components-of-a-coding-agent
2•MindGods•8m ago•0 comments

Putting Intelligence to Work

https://vivekkaushal.substack.com/p/putting-intelligence-to-work
2•kaushalvivek•8m ago•0 comments

Vitamin D deficiency can lead to autoimmune diseases (2024)

https://medicalxpress.com/news/2024-10-vitamin-d-deficiency-autoimmune-diseases.html
1•OutOfHere•9m ago•2 comments

Using Perfetto in ZJIT

https://railsatscale.com/2026-03-27-using-perfetto-in-zjit/
1•gbourne1•9m ago•0 comments

"The internet could go down if Brundage spent too much time on his exams"

https://www.wsj.com/tech/kimwolf-hack-residential-proxy-networks-a712ab59
2•hank1931•11m ago•0 comments

The New Twist Browser for Devs

https://www.youtube.com/watch?v=fkrsH79HyKw
1•cintronsoftware•13m ago•0 comments

Slap: Functional Concatenative Language with a Borrow Checker?

https://taylor.town/slap-000
1•birdculture•16m ago•0 comments

Show HN: Batty – Run a team of AI coding agents in tmux with test gating

https://github.com/battysh/batty
1•Zedmor•22m ago•0 comments

Awesome

https://archive.openrockets.com/Litha2024-main/
1•techcast•23m ago•0 comments

UK's leading AI research institute told to make 'significant' changes

https://www.theguardian.com/technology/2026/apr/03/uk-alan-turing-institute-ai-research-underperf...
2•Brajeshwar•24m ago•1 comments

Ask HN: How do you handle clients who don't pay on time?

2•Hustlr786•26m ago•2 comments

Show HN: A local GitHub-like code review tool to work with agents

https://github.com/wong2/diffx
1•wonderfuly•26m ago•0 comments

Show HN: Engram – Persistent Memory API with Drift Detection for AI Agents

https://engram.cipherbuilds.ai
1•Adam_cipher•28m ago•0 comments

Keet the P2P chat app for privacy

https://keet.io/
1•janandonly•28m ago•0 comments

AI Whiz Kids Dropped Out of College and Got Investors to Pay Their Bills

https://www.wsj.com/tech/ai/ai-college-dropouts-ecc665b7
3•cebert•32m ago•0 comments

Blur Blitz – a visual Wordle where AI scores how close your guess is

https://blurblitz.io/play?daily
1•Ainzz•32m ago•0 comments

Show HN: ECX a 'Jail-Fix' for RLHF Neutrality Loops in LLMs

https://zenodo.org/records/18712534
2•Weatherill•34m ago•0 comments

We security-graded 20K MCP servers – only 20% passed all 7 criteria

https://www.loaditout.ai/
3•loaditoutai•36m ago•0 comments

Scorecard for US Military aircraft over Iran

https://fallows.substack.com/p/your-scorecard-for-us-military-aircraft
1•xrd•38m ago•0 comments

Mystifying Auto-Brewery Syndrome Makes People Spontaneously Drunk

https://www.nytimes.com/2026/04/03/well/autobrewery-syndrome.html
3•bookofjoe•38m ago•1 comments

How to Survive OpenClaw on Codex

https://telegraphic.substack.com/p/how-to-survive-openclaw-on-codex
1•telegrahi•41m ago•1 comments

Astroturfing

https://en.wikipedia.org/wiki/Astroturfing
2•chistev•41m ago•1 comments

Show HN: Ownscribe – local meeting transcription, summarization and search

https://github.com/paberr/ownscribe
1•paberr•47m ago•0 comments

Show HN: Forking mods to add interactive mode

https://mil.ad/blog/2026/interactive-mods.html
1•playnext•51m ago•0 comments

Show HN: AdaShape-3D modeler for intuitive 3D printing parts / Windows 11

https://adashape.com
2•fsloth•51m ago•0 comments

Ex-Microsoft engineer blames Azure problems on talent exodus

https://www.theregister.com/2026/04/04/azure_talent_exodus/
2•beardyw•54m ago•0 comments

Acer and Asus shut down support website in wake of patent dispute ruling

https://www.tomshardware.com/pc-components/acer-and-asus-shut-down-support-for-pc-and-laptops-in-...
1•breve•59m ago•0 comments