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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/

Catnip lotion as effective as Deet at repelling mosquitoes, study finds

https://www.theguardian.com/global-development/2026/jul/07/catnip-lotion-as-effective-as-deet-at-...
2•rbanffy•2m ago•0 comments

Which Doc Format Is Best for AI Specifications?

http://blog.vanillajava.blog/2026/07/which-doc-format-is-best-for-ai.html
1•peter_lawrey•3m ago•1 comments

Be using a meta harness for agents

https://garrit.xyz/posts/2026-07-15-you-should-be-using-a-meta-harness-for-agents
3•garritfra•6m ago•0 comments

Ask HN: How are you productive with GPT 5.6 Sol?

1•hk__2•7m ago•0 comments

Write in your native language, ship in English

https://www.echoo.ai/blog/write-2x-faster-in-your-native-language
1•mike-el•8m ago•0 comments

Show HN: VSCode Inline Comments with MCP

https://github.com/gabi-a/inline-comments
1•gabia•10m ago•0 comments

Good ol' SAST to keep your token usage from spiraling

https://blog.codacy.com/deterministic-static-analysis-for-ai-coding-workflows-how-to-cut-token-co...
1•claudiacsf•12m ago•1 comments

AIDE²: First Evidence of Recursive Self-Improvement

https://www.weco.ai/blog/first-evidence-of-recursive-self-improvement
3•EvgeniyZh•13m ago•0 comments

What Is RDMA over Converged Ethernet (RoCE)?

https://ubuntu.com/blog/what-is-rdma-over-converged-ethernet-roce
1•ankitg12•14m ago•0 comments

Poka-Yoke

https://en.wikipedia.org/wiki/Poka-yoke
1•kesor•15m ago•0 comments

Sealed Tomb Filled with Paintings and Inscriptions Discovered in Egypt

https://www.labrujulaverde.com/en/2026/07/sealed-tomb-of-a-high-official-or-priest-filled-with-pa...
2•isaacfrond•16m ago•0 comments

Show HN: EzTranslate – Photo Translator Specifically for ZH-TW Speaker

https://eztranslate.com.tw/
1•sebjones•19m ago•0 comments

I'm building a project rn that shares ad revenue with users. What do you think?

2•jezzwar•20m ago•2 comments

Primes of the form x^2 + n y^2

https://github.com/rahulsudhu/primes_of_the_form
2•rsuds211•20m ago•0 comments

Free File Converter: How I build it

https://convert.bz/en
1•GemsGame•22m ago•0 comments

Pluto – a new app engine for reMarkable devices

https://twitter.com/mikediarmid/status/2077308240035979353
1•salakar•23m ago•0 comments

RAG system isn't hallucinating. It never found the answer

https://artifipedia.com/blog/rag-retrieval-not-generation
1•stoicstoic•25m ago•0 comments

Show HN: DTAP – test and text anything protocol

https://github.com/melezhik/doubletap
1•melezhik•32m ago•0 comments

Porting nanochat to a TPU: what carries over from PyTorch, and what breaks

https://github.com/tucan9389/nanochat-jax/discussions/1
2•tucan9389•33m ago•0 comments

The State of Age Verification in 2026

https://aztec-labs.com/blog/age-verification-state-2026
1•rzk•40m ago•0 comments

How to Build 1-Minute OHLC Bars from Non-Uniform Market Snapshot Data

https://medium.com/@DolphinDB_Inc/how-to-build-1-minute-ohlc-bars-from-non-uniform-market-snapsho...
2•yiweileng•40m ago•0 comments

Ask HN: How do you track feedback when you post across multiple places?

6•georgi_94•41m ago•0 comments

Ask HN: What Are You Building with AI?

1•fraXis•47m ago•3 comments

Ask HN: Evidence for JavaScript ecosystem being more vulnerable than Rust's?

1•pascahousut•47m ago•0 comments

Locksmith scams: 'I was shut out with my baby and charged £2,200 to get back in'

https://www.theguardian.com/money/2026/jul/15/the-scary-rise-of-locksmith-scams-i-was-shut-out-wi...
2•YeGoblynQueenne•50m ago•0 comments

The Myth of Sisyphus

https://en.wikipedia.org/wiki/The_Myth_of_Sisyphus
1•chistev•50m ago•1 comments

Show HN: A tool that reviews subreddit promotion rules before you post

https://wheretopost.com/
1•elng•52m ago•1 comments

What Do ASML's Q2 2026 Results Tell Us About the AI Boom?

https://mrkt30.com/what-do-asmls-q2-2026-results-tell-us-about-the-ai-boom/
2•technewssss•52m ago•3 comments

Show HN: OpenSCAD Models for Industrial Grade R/C Lawnmower

https://github.com/zelon88/RC_Mower_Trailer
1•zelon88•56m ago•0 comments

FreeBSD 16 Retires the Last GPL Code from Its Base System

https://www.phoronix.com/news/FreeBSD-16-Goes-GPL-Free
3•brandhout•56m ago•0 comments