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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/

New Boutique in Cow Hollow Is Completely Run by AI, Which Manages Human Staff

https://sfist.com/2026/04/14/new-boutique-in-sfs-cow-hollow-is-completely-run-by-ai-which-manages...
1•cdrnsf•49s ago•0 comments

The "AI Vulnerability Storm": Building a "Mythos-ready“ security program [pdf]

https://labs.cloudsecurityalliance.org/wp-content/uploads/2026/04/mythosreadyv9.pdf
1•_tk_•2m ago•0 comments

Show HN: Send physical postcards from your coding harness

https://api.melonpost.com/SKILL.md
1•thevelop•3m ago•0 comments

Which country can claim steak?

https://www.bbc.com/travel/article/20260402-which-country-can-claim-steak
1•Cider9986•3m ago•0 comments

Sindarov Wins Candidates with Round to Spare

https://www.chess.com/news/view/2026-fide-candidates-tournament-round-13
1•FergusArgyll•4m ago•0 comments

Chinese Electrotech Is the Big Winner in the Iran War

https://paulkrugman.substack.com/p/chinese-electrotech-is-the-big-winner
2•dxs•4m ago•0 comments

Who sent you? – The agent identity crisis

https://highflame.com/blogs/who-sent-you-solving-the-agent-identity-crisis
2•jalbrethsen•7m ago•0 comments

Show HN: Monitor AWS activity and security events using CloudTrail

https://github.com/cloudwatcher-dev/cloudwatcher-aws-cloudformation
1•henriklipp•7m ago•0 comments

Court rules X must give privacy researcher access to personal data

https://nltimes.nl/2026/04/14/court-rules-x-must-give-privacy-researcher-access-personal-data-pri...
2•Kiala•8m ago•0 comments

What Would You See Changed in Haskell?

https://blog.haskell.org/what-would-you-see-changed-in-haskell/
2•birdculture•12m ago•0 comments

Why, After All These Years, MZI-Based Transistorlessness Might Finally Be Here

https://write.as/mnggfj7asl07k
1•aniijbod•13m ago•0 comments

Show HN: Sk.illmd.com, a forum for talking about and showing off agent skills

https://skillmd.discourse.group/
1•0gs•13m ago•1 comments

Poking at AttnRes with NanoGPT

https://axu.sh/post/attention-residuals
2•abhiux•14m ago•0 comments

AI is flattening who we uniquely are

https://twitter.com/heyohelen/status/2044126575399186565
1•trovewithin•14m ago•0 comments

Truth Machine: PW Talks with Kevin Hartnett

https://www.publishersweekly.com/pw/by-topic/authors/interviews/article/100085-truth-machine-pw-t...
1•digital55•16m ago•0 comments

Finding unusual machines in network scans

https://xn--mbius-jua.band/blog/nmapview/
2•gebgebgeb•16m ago•0 comments

Nvidia slaps forehead: I know what quantum is missing – it's AI

https://www.theregister.com/2026/04/14/nvidia_ai_quantum_computing/
1•blackcoffeerain•16m ago•0 comments

AI platform that audits websites daily and tracks competitor SEO

https://arlocmo.site
1•decentrowe•17m ago•0 comments

Fake Linux leader using Slack to con devs into giving up their secrets

https://www.theregister.com/2026/04/13/linux_foundation_social_engineering/
1•blackcoffeerain•18m ago•0 comments

The cost of building a workflow editor on React Flow

https://www.workflowbuilder.io/blog/build-vs-buy-workflow-editor-hidden-cost-react-flow
6•maciek996•18m ago•0 comments

Why Amazon Is Buying Starlink Rival Globalstar in $11B Deal

https://www.wsj.com/tech/amazon-to-acquire-globalstar-in-satellite-cellular-connection-push-448d5a16
3•JumpCrisscross•19m ago•0 comments

I built a free SSH relay for homelab machines behind CGNAT

1•rasengan•21m ago•0 comments

Show HN: Tip for users with Samsung Galaxy S7 with broken display

1•ike____________•23m ago•0 comments

iPhone Ultra – First Look [video]

https://www.youtube.com/watch?v=f7UA1Hmg53Q
2•quadrige•25m ago•0 comments

Coreboot Comes to AMD Ryzen Powered Star Labs StarBook MK VI After 3 Year Wait

https://www.phoronix.com/news/Coreboot-StarBook-MK-VI
1•Bender•27m ago•0 comments

Show HN: Website Is a Video Game

https://run-labs.com/
2•mnewme•28m ago•0 comments

Figma Design to Code, Code to Design: Clearly Explained

https://blog.bytebytego.com/p/figma-design-to-code-code-to-design
3•edbentley•28m ago•0 comments

GitHub's Fake Star Economy

https://awesomeagents.ai/news/github-fake-stars-investigation/
2•ajayvk•28m ago•3 comments

Autonomous Robot Brigade Successfully Retook Russian Positions in Ukraine

https://www.thetimes.com/world/russia-ukraine-war/article/ukraine-robot-army-war-russia-surrender...
3•alephnerd•28m ago•0 comments

Best prompt database for AEs.100% free

https://crushquota.ai/
1•yous587•28m ago•1 comments