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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

Metastability in Recovery: Cascading Recovery with a Loop

https://charap.co/metastability-in-recovery-cascading-recovery-with-a-loop/
1•matt_d•6m ago•0 comments

Show HN: Tidal town – HTML5 game where you protect your town from tides

https://threej.in/games/tidal-town/index.html
2•threejin•15m ago•0 comments

Suno has acquired Songkick (YC 2007)

https://www.hypebot.com/suno-has-asquired-songkick-what-it-means-for-artists/
1•ellrob88•24m ago•1 comments

The 2-Hour Marathon Barrier Gets Smashed. Is It the Shoes–Or the Sugar?

https://www.wsj.com/sports/the-2-hour-marathon-barrier-gets-smashed-sabastian-sawe-c289c9f5
1•canucker2016•25m ago•1 comments

Show HN: I'm running parallel Pi agents on a local sandbox

https://github.com/CelestoAI/SmolVM/
2•theaniketmaurya•27m ago•0 comments

Australian medical first saved US Marine's life after military aircraft crash

https://www.abc.net.au/news/2026-05-03/australian-medical-first-us-marine-life-saved-beat-odds/10...
1•defrost•29m ago•0 comments

High-tech Chinese cars pop up in California thanks to legal loophole

https://nypost.com/2026/04/29/us-news/high-tech-chinese-cars-pop-up-in-california/
3•harambae•32m ago•0 comments

CS 153: Frontier Systems – Stanford University

https://cs153.stanford.edu
2•vismit2000•36m ago•0 comments

The Irreducible Skill

https://www.vinniefalco.com/p/the-irreducible-skill
1•ibobev•38m ago•0 comments

Windows API Is Successful Cross-Platform API

https://retrocoding.net/windows-api-is-successful-cross-platform-api
3•phendrenad2•40m ago•0 comments

After Mythos, Nobody Is Safe from Cybersecurity Threats

https://www.nytimes.com/2026/04/28/opinion/cybersecurity-mythos.html
1•furcyd•42m ago•0 comments

Postfix 1998, Dovecot 2002, Roundcube 2008: Why Email Stack Frozen 25 Years?

1•panelica•44m ago•0 comments

Fun, open-source AI transparency project

https://github.com/realalonw/agent-receipts
1•walon•49m ago•1 comments

AI, Intimacy, and the Data You Never Meant to Share

https://fshot.org/techzone/the-algorithm-knows.php
1•victorkulla•51m ago•0 comments

What the Benchmark Cannot See

https://exoskeleton.ghost.io/what-the-benchmark-cannot-see/
1•pdoomzero•51m ago•0 comments

Open Source Does Not Imply Open Community

https://blog.feld.me/posts/2026/04/open-source-does-not-imply-open-community/
12•RohanAdwankar•57m ago•1 comments

Elon Musk gets an apology from California regulators as a SpaceX lawsuit settled

https://apnews.com/article/california-coastal-commission-spacex-elon-musk-33065c34cc0555faa91ca25...
9•db48x•1h ago•4 comments

Prompt Engineering Is Permanent

https://yiblet.com/posts/prompt-engineering-is-permanent/
2•syiblet•1h ago•0 comments

Year of the Linux Laptop: Omarchy on XPS

https://www.dell.com/en-us/blog/year-of-the-linux-laptop-omarchy-on-xps/
5•evanjrowley•1h ago•0 comments

A PQC Almanac (2025) [pdf]

https://downloads.bouncycastle.org/java/docs/PQC-Almanac.pdf
1•mooreds•1h ago•0 comments

Dr. Jordan B. Peterson's 10 Step Guide to Clearer Thinking Through Essay Writing

https://medium.com/practicecomesfirst/dr-jordan-b-petersons-10-step-guide-to-clearer-thinking-thr...
1•eigenBasis•1h ago•1 comments

Comparing the best open source TranslateGemma projects

https://metalglot.com/blog/open-source-translategemma-comparison/
1•metalglot•1h ago•0 comments

The AI workflow I use to build apps

https://juanmanuelalloron.com/post/my-current-ai-workflow-for-building-apps/
1•juan_allo•1h ago•0 comments

Show HN: Pantheon – A Path 1 PlayStation 2 game engine (VU1 / EE / DMA)

https://github.com/94BILLY/PANTHEON
1•94BILLY•1h ago•0 comments

Can a Hand‑Built EV Change Mobility in East Africa? [video]

https://www.youtube.com/watch?v=gh4N_UNyKgk
1•thelastgallon•1h ago•0 comments

Farewell, Jeeves: Ask.com shuts down

https://techcrunch.com/2026/05/02/farewell-jeeves-ask-com-shuts-down/
2•mikece•1h ago•0 comments

Original Apollo 11 code open-sourced by NASA

https://www.tomshardware.com/software/original-apollo-11-code-open-sourced-by-nasa-original-comma...
2•ohjeez•1h ago•0 comments

Too Dark? Too Bright? Scientists Need Your Help to Make Reading Easier

https://news.ncsu.edu/2026/04/citizen-science-reading-project/
1•ohjeez•1h ago•0 comments

Intelligence Buying Intelligence

https://stevekrouse.com/intelligence
1•azhenley•1h ago•1 comments

Running Shoes Have Evolved – From Ancient Greece to Record-Breaking Marathons

https://www.nytimes.com/2026/05/01/sports/running-shoe-history-adidas-sneakers-london-marathon.html
1•y1n0•1h ago•0 comments