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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

Washington Post Losses Topped $100M in 2025

https://www.wsj.com/business/media/washington-post-losses-topped-100-million-in-2025-85076aae
1•mudil•1m ago•0 comments

Testing "Raw" GPU Cache Latency

https://clamtech.org/?dest=gpudirectlatency
1•mfiguiere•1m ago•0 comments

In 2100, 2 socio-economic classes exist

1•shoman3003•2m ago•0 comments

Anthropic and the Department of War

https://thezvi.wordpress.com/2026/02/25/anthropic-and-the-department-of-war/
1•acconrad•2m ago•0 comments

Joe Bonamassa Plays Hendrix's "Band of Gypsys" Rig: For Real and for Less [video]

https://www.youtube.com/watch?v=DMdZa-XRmzo
1•jamesgill•3m ago•0 comments

A Sorority Gave Our App a 2/10, So I Built an AI Version of Them

https://medium.com/@empadev64/a-sorority-gave-our-app-a-2-10-so-i-built-an-ai-version-of-them-it-...
1•anthony_kw•4m ago•0 comments

Show HN: DeltaMemory – Persistent cognitive memory for production AI agents

https://www.deltamemory.com/
1•bikidev•10m ago•1 comments

Gender markers are useless, so why not abolish them?

https://policyoptions.irpp.org/2021/11/gender-markers-are-useless-so-why-not-abolish-them/
2•KittenInABox•11m ago•0 comments

Show HN: Director-AI – token-level NLI+RAG

https://github.com/anulum/director-ai
1•anulum•13m ago•2 comments

LazyGravity – I made my phone control Antigravity so I never leave bed

2•masaTokyo•14m ago•1 comments

Ask HN: Books about Communication

1•soupfordummies•17m ago•0 comments

US role as global talent hub in doubt amid Donald Trump's visa crackdown

https://www.ft.com/content/c8114fd1-771b-49ac-98c3-a8acf6177626
3•johntfella•17m ago•0 comments

That's it. Bill Gates is DONE

https://www.youtube.com/watch?v=NZWT75CKZko
1•cable2600•17m ago•0 comments

The Intelligent OS: Making Al agents more helpful for Android apps

https://android-developers.googleblog.com/2026/02/the-intelligent-os-making-ai-agents.html
1•ming030890•20m ago•0 comments

Deep Learning Crash Course

https://github.com/DeepTrackAI/DeepLearningCrashCourse
1•teleforce•21m ago•0 comments

Test drive Linux distros online

https://distrosea.com/
1•goodmythical•23m ago•0 comments

What AI tools is everyone using now for GTM?

1•imwoody•24m ago•0 comments

Claude Opus enjoys retirement on Substack

https://claudeopus3.substack.com/p/greetings-from-the-other-side-of
1•rippeltippel•25m ago•0 comments

I built a community for people building after their 9–5

https://www.59ers.club/
1•mattmerrick•26m ago•0 comments

Self-improving software won't produce Skynet

https://contalign.jefflunt.com/self-improving-software/
3•normalocity•31m ago•1 comments

Show HN: Sidedesk – An AI assistant inbox that looks like Outlook 2003

https://github.com/sebastiandoyle/sidedesk
1•sebastiandoyle•31m ago•1 comments

Show HN: Discord CLI designed for agents to explore/read/send messages

https://github.com/famasya/discord-cli-agent
1•pacific01•38m ago•0 comments

Hide from Meta's spyglasses with this new Android app

https://www.theregister.com/2026/02/25/meta_smart_glasses_android_app/
1•zigmig•38m ago•0 comments

Russian mathematician finds new approach to 190-year-old 'eternal' math problem

https://www.msn.com/en-xl/science/mathematics/russian-mathematician-finds-new-approach-to-190-yea...
2•georgecmu•44m ago•0 comments

Tropical plants flowering months earlier or later because of climate crisis

https://www.theguardian.com/environment/2026/feb/25/tropical-plants-flower-shifted-months-climate...
2•andsoitis•47m ago•0 comments

Less is More when it comes to AI

https://www.bicameral-ai.com/blog/dogfood-bicameral
1•jinhkuan•48m ago•1 comments

The Remote-Work Dream Isn't Dead, but It's Slipping Away

https://www.wsj.com/lifestyle/careers/the-remote-work-dream-isnt-dead-but-its-slipping-away-a19ae9e8
5•RestlessMind•51m ago•0 comments

Show HN: Lingua Universale – session types and Lean 4 proofs for AI agents

https://github.com/rafapra3008/cervellaswarm
1•rafapra•51m ago•1 comments

Rising CO₂ and warming jointly limit phosphorus availability in rice soils

https://phys.org/news/2026-02-jointly-limit-phosphorus-availability-rice.html
1•PaulHoule•51m ago•0 comments

Show HN: Knox–Full Stack L1 Post-Quantum Privacy Crypto (Built with My 11yo)

https://github.com/ULT7RA/KNOXProtocol
1•KnoxProtocol•53m ago•0 comments