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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/

We Need Servers – Lots of Servers

https://www.nextplatform.com/compute/2026/03/26/we-need-servers-lots-of-servers/5211678
1•jonbaer•2m ago•0 comments

Everyone Hates iPhone Autocorrect. An Update Fixes One of the Biggest Problems

https://www.wsj.com/tech/apple-iphone-autocorrect-update-7659d618
1•RyanShook•3m ago•0 comments

Searching for the Perfect Sync

https://sunshine-jones.com/searching-for-the-perfect-sync/
1•lightyrs•6m ago•1 comments

Volvo Infotainment Glitches Spark Class Action Lawsuit

https://www.autoblog.com/news/volvo-infotainment-glitches-spark-major-class-action-lawsuit
1•carefree-bob•11m ago•1 comments

Epic Lays Off Employee with Terminal Brain Cancer Who Cant Get LifeInsurance Now

https://kotaku.com/epic-games-layoffs-fortnite-brain-cancer-2000682941
1•Jimmc414•11m ago•1 comments

Show HN: React-Rewrite – Figma for localhost that directly edits your codebase

https://github.com/donghaxkim/react-rewrite
1•donghaxkim•14m ago•0 comments

The Socially Acceptable Use of AI in Business

https://kellblog.com/2026/03/29/on-the-socially-acceptable-use-of-ai-in-business/
1•doppp•17m ago•0 comments

AI-powered migrations from Postgres to ClickHouse

https://clickhouse.com/blog/ai-powered-migraiton-from-postgres-to-clickhouse-with-fiveonefour
1•tosh•17m ago•0 comments

SparkID: Fast, sortable, compact unique IDs

https://www.youssefm.com/posts/sparkid
1•pinkbeanz•19m ago•0 comments

GPT 5.4 sucks at front end

1•apoorvdarshan•21m ago•0 comments

Portable MicroNeedle Fractional RF Machine

https://www.sanhelasers.com/products/portable-fractional-microneedle-rf-machine/
1•SANHE•29m ago•0 comments

The Sudden Fall of OpenAI's Most Hyped Product Since ChatGPT

https://www.wsj.com/tech/ai/the-sudden-fall-of-openais-most-hyped-product-since-chatgpt-64c730c9
10•fortran77•30m ago•3 comments

Pretext

https://simonwillison.net/2026/Mar/29/pretext/
1•lumpa•31m ago•0 comments

How to Recognise Kentucky on a Map

https://mammothmemory.net/geography/usa/states-of-america/how-to-remember-where-the-american-stat...
2•kamaraju•31m ago•0 comments

Training the Idea Muscle

https://sfalexandria.com/posts/rileys-ideas/
3•nanfinitum•35m ago•0 comments

PyTorch Autograd and Mutation

https://blog.ezyang.com/2026/03/autograd-and-mutation/
1•matt_d•39m ago•0 comments

Why Don't You Use String Views Instead of Passing Std:Wstring by Const&

https://giodicanio.com/2024/05/14/why-dont-you-use-string-views-like-std-wstring_view-instead-of-...
2•Orochikaku•41m ago•0 comments

Agentic Hive – Manage Claude Code and Codex Tmux Sessions from a Browser

https://github.com/wisbric/agentic-hive
2•sscharlott•43m ago•0 comments

RAM Bubble Popping?

https://twitter.com/aakashgupta/status/2038077441911275594
1•roganp•48m ago•0 comments

How We Rewrote 130K Lines from React to Svelte in Two Weeks

https://strawberrybrowser.com/blog/react-to-svelte
1•thunderbong•50m ago•0 comments

Show HN: Real-time visualization of Claude Code agent orchestration

https://github.com/patoles/agent-flow
2•daco•51m ago•0 comments

Will This 'Miracle' Battery Change Your Mind About EVs?

https://www.wsj.com/lifestyle/cars/donut-lab-solid-state-battery-ssb-ev-4e6ad966
2•helterskelter•52m ago•1 comments

Seeing Trump Clearly

https://www.craigmurray.org.uk/archives/2026/03/seeing-trump-clearly/
2•curmudgeon22•55m ago•1 comments

We audited our own AI-written codebase. 13 issues, 5 categories

https://koalr.com/blog/ai-codebase-audit
1•Andrew_McCarron•57m ago•0 comments

GrapheneOS Refuses Age Verification, May Exit Regions That Enforce It

https://itsfoss.com/news/grapheneos-refuses-age-verification/
2•tuananh•57m ago•0 comments

How Ants Map Social Identity

https://neurosciencenews.com/ant-social-recognition-behavioral-30359/
1•bookofjoe•59m ago•0 comments

AI startups are eating the venture industry and the returns, so far, are good

https://techcrunch.com/2026/03/20/ai-startups-are-eating-the-venture-industry-and-the-returns-so-...
1•gmays•1h ago•2 comments

Stop wasting tokens–Entroly teaches AI which context matters.Save tokens. Save $

https://github.com/juyterman1000/entroly
1•abby-star•1h ago•0 comments

The Helen Keller Story Doesn't Add Up

https://www.youtube.com/watch?v=O_th1EszK34
2•gradus_ad•1h ago•0 comments

Show HN: StretchPing – Free break reminders with guided stretches for developers

https://stretchping.polsia.app/
1•stratchping•1h ago•1 comments