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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

To sign or not to sign: Practical vulnerabilities in GPG and friends [video]

https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i
1•doener•42s ago•0 comments

CES 2026: Where enthusiasm meets reality and technology proves its worth

https://comuniq.xyz/post?t=673
1•01-_-•1m ago•0 comments

Equal Length Words

https://susam.net/eql.html
2•susam•7m ago•0 comments

Computer use or tool calling – what's best for real world work agents?

1•akshat77•14m ago•0 comments

Show HN: Remove your data from 100 platforms without signing up

https://www.offlist.me
1•rahulkandoriya•14m ago•1 comments

Exploring the Untouched Abandoned IBM Corporate Retreat

https://www.youtube.com/watch?v=DjQ2PAgUcM8
1•dandelionv1bes•18m ago•0 comments

iPad kids are more anxious, less resilient, and slower decision makers

https://www.theregister.com/2025/12/30/ipad_kids_are_more_anxious/
1•Bender•20m ago•0 comments

Global coal demand has reached a plateau and may well decline slightly by 2030

https://www.iea.org/news/global-coal-demand-has-reached-a-plateau-and-may-well-decline-slightly-b...
1•smurda•20m ago•0 comments

Show HN: Interactive magical particles simulation in pure C++ (SDL2)

https://github.com/CoolMartinBonk/Gift-from-other-planet
1•martin2000•20m ago•0 comments

Beyond New START: What Happens Next in Nuclear Arms Control?

https://www.rusi.org/explore-our-research/publications/commentary/beyond-new-start-what-happens-n...
1•zeristor•21m ago•0 comments

The most durable tech is boring, old, and everywhere

https://www.theregister.com/2025/12/31/long_lived_tech/
1•Bender•21m ago•0 comments

IPv6 just turned 30 and still hasnt taken over the world, dont call it a failure

https://www.theregister.com/2025/12/31/ipv6_at_30/
2•Bender•23m ago•0 comments

CATL Makes Big Announcement on Sodium Batteries for 2026

https://cleantechnica.com/2025/12/29/catl-makes-big-announcement-on-sodium-batteries-for-2026/
1•ksec•27m ago•0 comments

Peek-a-boo and the First Lesson in Awareness [essay]

https://omegaaxiommeta.substack.com/p/why-we-play-peek-a-boo-contrast-pattern
1•nilegreen•32m ago•1 comments

Enough of the 'Hey you ' faux-friend nonsense. You're a business, not my mate

https://www.theguardian.com/commentisfree/2026/jan/01/the-hill-i-will-die-on-business-friend-indi...
3•beardyw•35m ago•0 comments

Built AI chatbot platform to be 100% EU-hosted after customers refused OpenAI

https://www.chatvia.ai
1•mayahi•40m ago•0 comments

Bulgaria joins euro area from 1 January

https://ec.europa.eu/commission/presscorner/detail/de/ip_25_3123
2•yreg•40m ago•0 comments

China builds a record-breaking hypergravity machine to compress space & time

https://www.google.com/url?q=https://www.scmp.com/news/china/science/article/3338193/china-builds...
1•mnming•42m ago•0 comments

Windows 11 Outperforming Linux on an Intel Arrow Lake H Laptop

https://www.phoronix.com/review/windows-beats-linux-arl-h
26•tuananh•45m ago•7 comments

Deltax: A non-decision AI governance framework with explicit stop conditions

https://zenodo.org/records/18100154
1•DELTA-X•45m ago•1 comments

Bluetooth Headphone Jacking: A Key to Your Phone [video]

https://media.ccc.de/v/39c3-bluetooth-headphone-jacking-a-key-to-your-phone
2•AndrewDucker•48m ago•0 comments

V programming language version 0.5 released

https://github.com/vlang/v/releases/tag/0.5
4•hggh•49m ago•0 comments

Show HN: 1seed – Derive all your crypto keys from a single seed

https://github.com/oeo/1seed
1•genesishash•50m ago•0 comments

Show HN: BakwasLogin – A user-hostile login with physics-based password entry

https://www.bakwaslogin.app/
2•bhavesh_kukreja•56m ago•0 comments

IQuest-Coder: Open model w/ 81.4% on SWEBench

https://iquestlab.github.io/
5•denysvitali•57m ago•0 comments

Role of psychological strengths in positive life outcomes in adults with ADHD

https://www.cambridge.org/core/journals/psychological-medicine/article/role-of-psychological-stre...
1•bookofjoe•57m ago•1 comments

Bulk image conversion client-side using Web Workers

1•lemongravity•58m ago•0 comments

Navigating Moats in the AI Transition

https://shaokang.substack.com/p/navigating-moats-in-the-ai-transition
1•Wraecca•1h ago•0 comments

Facebook is testing a link-posting limit for professional accounts and pages

https://techcrunch.com/2025/12/17/facebook-is-testing-a-link-posting-limit-for-professional-accou...
3•austinallegro•1h ago•0 comments

I rebooted my social life

https://takes.jamesomalley.co.uk/p/this-might-be-oversharing
3•edent•1h ago•0 comments