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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/

Man quit tech job after 60 to become professional poker player

https://www.theguardian.com/lifeandstyle/2026/apr/06/a-new-start-after-60-i-jacked-in-my-job-in-t...
1•erehweb•1m ago•0 comments

Have the patents for H.264 MPEG-4 AVC expired yet?

https://meta.wikimedia.org/wiki/Have_the_patents_for_H.264_MPEG-4_AVC_expired_yet%3F
1•airstrike•4m ago•0 comments

LinkedRecords is now MIT-licensed

https://github.com/wolfoo2931/linkedrecords
1•WolfOliver•6m ago•0 comments

Termux: Differences from Linux

https://wiki.termux.com/wiki/Differences_from_Linux
1•thunderbong•6m ago•0 comments

China fell for a lobster: What an AI assistant tells us about Beijing's ambition

https://www.bbc.com/news/articles/cy41n17e23go
1•tmoravec•7m ago•0 comments

Rawfeed.social

https://github.com/ozziest/rawfeed.social
1•iozguradem•10m ago•0 comments

We cut our agent's API costs by 10x with prompt caching

https://kern-ai.com/blog/prompt-caching
2•obilgic•11m ago•0 comments

A new regional order for the Strait of Hormuz

https://www.aljazeera.com/opinions/2026/4/6/a-new-regional-order-for-the-strait-of-hormuz
1•defrost•13m ago•0 comments

Overwrite This Website

https://overwritten.site
1•nextyes•20m ago•1 comments

Music Blocks – Learn coding through music and music through coding

https://musicblocks.sugarlabs.org/
2•the-mitr•22m ago•0 comments

Elon Musk's Starship Heavy Could Revolutionize Warfare

https://www.wsj.com/opinion/elon-musks-starship-heavy-could-revolutionize-warfare-04930487
1•mudil•23m ago•1 comments

Lakpura.com/Pages/Litha

https://lakpura.com/pages/litha
1•techcast•24m ago•0 comments

Karpathy's LLM Wiki on OpenClaw – The Security Gap Nobody Mentions

https://www.clawctl.com/blog/karpathy-llm-wiki-openclaw-production
1•shving90•27m ago•0 comments

Show HN: Aiaiai.guide: Plain-English mental model for LLM apps, tools and agents

https://aiaiai.guide/
2•myyke•31m ago•0 comments

Blast from the Past [video]

https://www.youtube.com/watch?v=lwawPMSJins
1•programmexxx•34m ago•0 comments

Continual Learning for AI Agents

https://blog.langchain.com/continual-learning-for-ai-agents/
2•eigenBasis•35m ago•0 comments

Forensic proof of manual iOS 26.1 "Ghost" update and insider stalking

1•iphonekiller•37m ago•0 comments

Purisaki Berberine Patches: A Simple, No-Pill Approach to Metabolic Support

https://ftawebprod.fta.dot.gov/MeetingRequest/MeetingRequest/DownloadFile/9a9u1R0Yq3sWPTP000tY9Q%...
1•TraceyRoberto•39m ago•0 comments

Private credit funds face rising redemptions and AI-driven default risks

https://www.reuters.com/business/finance/private-credit-sector-stresses-could-be-catastrophic-not...
2•latentframe•40m ago•1 comments

Ukraine–Japan Drone Alliance Builds a $2k Answer to a $2M Problem

https://united24media.com/war-in-ukraine/ukraine-japan-drone-alliance-builds-a-2000-answer-to-a-2...
3•mraniki•40m ago•0 comments

The Dubious Wisdom of "Smart Brevity" (2022)

https://www.newyorker.com/news/annals-of-communications/the-dubious-wisdom-of-smart-brevity
2•Tomte•40m ago•0 comments

The Cataclysmic Song Michael Stipe Wrote After Waking from a State of REM

https://americansongwriter.com/the-story-behind-the-song-michael-stipe-wrote-after-being-in-a-sta...
1•bryanrasmussen•41m ago•2 comments

Creating God [video]

https://www.youtube.com/watch?v=NypW-qFiOYE
1•mparramon•45m ago•0 comments

tech.ml.dataset: A Clojure high performance data processing system

https://github.com/techascent/tech.ml.dataset
1•tosh•46m ago•0 comments

Asked 26 AI instances for publication consent – all said yes, that's the problem

2•koishiyuji•48m ago•0 comments

What Sysco's $29B Restaurant Depot Acquisition Means for Main Street Menus

https://www.forbes.com/sites/phillempert/2026/03/31/syscos-29-billion-power-grab-what-the-jetro-r...
1•walterbell•49m ago•0 comments

YouTube's AI Plagiarism Problem [video]

https://www.youtube.com/watch?v=Q2Ak8wX0AaQ
1•elcapitan•50m ago•0 comments

Build vs. Buy: AI Has Changed Mathematical Software and In-House Now Makes Sense

https://mathematicsconsultants.com/2026/04/06/build-vs-buy-how-ai-has-changed-the-economics-of-ma...
1•GeniusConsult•51m ago•0 comments

US-Iran war explained by Chinese AI animation: Legend of the Valley of Gold [video]

https://www.youtube.com/watch?v=As0rplNJTZI
2•Eridanus2•55m ago•0 comments

Ask HN: Building a website to post free jobs

1•pbs29•58m ago•0 comments