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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/

An open-source diagram skill for designer

https://github.com/cathrynlavery/diagram-design
1•Nina_antalpha•1m ago•0 comments

Is PDF a Problem for AI?

https://pdf4wcag.com/blog-news/is-pdf-a-problem-for-ai
1•JilBill•9m ago•2 comments

Finding All Solutions to LinkedIn-Queens Puzzle

https://wyounas.github.io/model-checking/puzzles/2026/06/06/finding-all-solutions-to-linkedin-que...
1•simplegeek•11m ago•0 comments

SpaceX sues to block release of tax-break records for its Texas Terafab project

https://www.businessinsider.com/spacex-terafab-tax-break-records-ai-transparency-texas-2026-9
1•snikolaev•11m ago•0 comments

Show HN: 1080p is 920px tall – 1k real browser viewports

https://screensize.net/reports/viewport-stats
1•zenpe•12m ago•0 comments

Language Makes Power Feel Like Common Sense

https://linguistically.substack.com/p/antonio-gramsci-how-language-makes
1•akbarnama•12m ago•0 comments

Australian insurer offers discount to self-driving car owners

https://www.smh.com.au/business/consumer-affairs/humans-make-mistakes-insurer-offers-discount-to-...
2•Alien1Being•13m ago•0 comments

Human bottleneck will not let AI replace any jobs

2•jatindavis05•16m ago•0 comments

Open-source project: Use ChatGPT Web models directly in Codex

https://github.com/miuuyy/codex-chatgpt-web
1•Moon_Y•19m ago•0 comments

Confessions of an Unrepentant Slop Snob

https://charity.wtf/p/confessions-of-an-unrepentant-slop
1•BerislavLopac•22m ago•0 comments

Show HN: Descles, response level LLM message control with HITL approval flows

https://www.descles.com/
1•chiatzen•25m ago•0 comments

If Astra was trained on 100k Blackwell GPUs, what happens with 1M Rubin?

https://twitter.com/JensenHuang/status/2096700264569090384
2•aurareturn•26m ago•1 comments

South Africa's weigh-and-pay shops are tackling 'poverty tax' head on

https://www.theguardian.com/global-development/2026/sep/14/south-africa-weigh-and-pay-shops-food-...
1•ljf•27m ago•0 comments

Three Reasons Europe learned to distrust Big Tech before America did

https://thebulletin.org/premium/2026-09/three-reasons-europe-learned-to-distrust-big-tech-before-...
1•vrganj•29m ago•0 comments

My experience of September 11, 2001, from across the Hudson

https://medium.com/freedomofthought/if-nobody-loved-me-the-city-did-27ad19dbcb8a
1•raynchad•29m ago•0 comments

Ansto nuclear reactor marks 20 years of health and technology innovation

https://www.abc.net.au/news/2026-09-14/ansto-opal-nuclear-reactor-celebrates-20-years/107132928
1•ggm•29m ago•0 comments

Teaching a fruit fly to play chess

https://flychess-hq.vercel.app
1•qsort•29m ago•0 comments

The Cost of Omelas – 10 centuries of total people killed by nation states

https://omelas-dj1.pages.dev
1•epsteingpt•39m ago•1 comments

War over robotaxis in NYC heats up with retracted Waymo report, 'Autokill' novel

https://gothamist.com/news/war-over-robotaxis-in-nyc-heats-up-after-retracted-waymo-report-and-au...
1•tape_measure•39m ago•0 comments

What an ERC-4626 price test shows

https://medium.com/@giladha/what-an-erc-4626-price-test-actually-shows-9fce352c5bde
1•giladha•39m ago•0 comments

Show HN: I made an unlimited TikTok video generator to get views on the internet

https://cloney.app
1•phanahm•40m ago•0 comments

Ask HN: Why are HDMI connectors hard to reach in 2026?

1•final_moss•41m ago•1 comments

No cities on the Moon – there isn't enough water, scientists say

https://www.frontiersin.org/news/2026/09/14/no-cities-on-the-moon-there-isnt-enough-water-frontie...
2•geox•43m ago•0 comments

Another Slice of Swiss Cheese for Untrusted Monitoring

https://www.lesswrong.com/posts/zJWgfsad8o9Y8E9sb/another-slice-of-swiss-cheese-for-untrusted-mon...
2•joozio•44m ago•0 comments

Every tool you need, right in the browser

https://footrue.com/
2•rajeshrajappan•47m ago•0 comments

Can Geneticists Fight Disease by Targeting 'Nurture' Instead of 'Nature'?

https://www.nytimes.com/2026/09/08/science/epigenetic-editing.html
1•hodgesrm•47m ago•0 comments

Apple's Always-Listening Tech: A Privacy Nightmare Waiting to Happen

https://this.weekinsecurity.com/watch-what-you-say-apple-opens-the-door-to-a-nightmare-world-of-a...
1•signa11•48m ago•0 comments

Why big tech will hate the Australian tax office's latest ruling

https://theconversation.com/why-big-tech-will-hate-the-australian-tax-offices-latest-ruling-291571
4•billybuckwheat•50m ago•0 comments

Michaelsoft Binbows

https://binbows.net/
2•austinallegro•56m ago•0 comments

Closure Compiler: A JavaScript checker and optimizer

https://github.com/google/closure-compiler
3•csmantle•57m ago•0 comments