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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

Powers of Ten (1977) [video]

https://www.youtube.com/watch?v=0fKBhvDjuy0
1•susam•52s ago•0 comments

3D-Agent

https://3d-agent.com
1•gsunshinel•3m ago•0 comments

Tourists to US would have to reveal 5 years of social media activity: new plan

https://www.theguardian.com/us-news/2025/dec/10/tourists-social-media-trump
5•mikhael•9m ago•1 comments

Creating a Benevolent Industrial Deployer for Memecoins

https://substack.com/@fitziswriting/p-181255460
1•fitzyap•10m ago•0 comments

Internal RFCs saved us months of wasted work

https://highimpactengineering.substack.com/p/the-illusion-of-shared-understanding
1•romannikolaev•10m ago•0 comments

Replican't

https://thinkhuman.com/replicant/
2•jamesgill•11m ago•0 comments

RAM Is Ruining Everything

https://www.theverge.com/report/839506/ram-shortage-price-increases-pc-gaming-smartphones
1•edward•11m ago•0 comments

Transcripts dialectics Gregory Bateson 19th of July 1967 [pdf]

https://villonfilms.ca/main/transcripts-dialectics-gregory-bateson-19-7-67.pdf
1•oriettaxx•15m ago•0 comments

Hark: Voice prompts for LLMs, meeting minutes, quick voice journaling

https://github.com/FPurchess/hark
1•FPurchess•15m ago•0 comments

I Pitched Netflix a Friends-Style Casablanca Sitcom

https://stohl.substack.com/p/i-pitched-netflix-a-casablanca-sitcom
1•FreeQueso•17m ago•0 comments

Show HN: A 2-row, 16-key keyboard designed for smartphones

https://k-keyboard.com/Why-QWERTY-mini
2•QWERTYmini•18m ago•0 comments

Verum 2 closed back option

https://www.pragmaticaudio.com/articles/2023/07/welcome-to-pragmatic-audio/
1•juniedai•19m ago•1 comments

Ask HN: Why is codex suddenly giving me this error?

1•fcpguru•20m ago•0 comments

Show HN: Hacker News, Disstilled

https://www.trydistilled.ai/
1•alexbemore•21m ago•0 comments

Pro-AI super PAC launches first candidate ads

https://www.cnn.com/2025/12/10/tech/pro-ai-super-pac-launches-first-candidate-ads
3•e12e•22m ago•2 comments

Show HN: Skald – open-source context layer API that runs in your VPC

https://www.useskald.com/
3•yakkomajuri•22m ago•0 comments

A Thousand and One Nights in Italy

https://publicdomainreview.org/essay/a-thousand-and-one-nights-in-italy
2•lermontov•24m ago•0 comments

Epistatic Attack Surface: Redefining Cybersecurity Through Pareto Optimization

https://zenodo.org/records/17883443
1•alknqi•24m ago•0 comments

Nvidia-backed Starcloud trains first AI model in space, orbital data centers

https://www.cnbc.com/2025/12/10/nvidia-backed-starcloud-trains-first-ai-model-in-space-orbital-da...
3•gok•25m ago•0 comments

South Carolina sees 'alarming' increase in measles cases, with 280 in quarantine

https://scdailygazette.com/2025/12/05/sc-sees-alarming-increase-in-measles-cases-with-280-in-quar...
5•geox•25m ago•0 comments

Show HN: Automated License Plate Reader Coverage in the USA

https://alpranalysis.com
2•sodality2•25m ago•0 comments

Unsloth – Train LLMs 2x faster with 70% less VRAM

https://github.com/unslothai/unsloth
1•jhack•30m ago•0 comments

Unsupervised Cycle Detection in Agentic Applications

https://arxiv.org/abs/2511.10650
1•PaulHoule•32m ago•0 comments

Big Ideas 2026: Part 1

https://www.a16z.news/p/big-ideas-2026-part-1
2•amenghra•32m ago•0 comments

Changes to Via, Hypothesis' proxy server for annotation

https://web.hypothes.is/blog/changes-to-via-hypothesis-proxy-server-for-annotation/
1•cxr•34m ago•0 comments

I made a website to check if Cloudflare is down

https://www.iscloudflaredown.com/
2•vinlock•34m ago•1 comments

AIbraham Lincoln, the First AI Presidential Candidate

https://www.voteabe2028.ai/
2•beAbU•36m ago•1 comments

Is It a Bubble? By Howard Marks

https://www.oaktreecapital.com/insights/memo/is-it-a-bubble
6•saigrandhi•37m ago•0 comments

Testing and Benchmarking of AI Compilers

https://www.broune.com/blog/testing-and-benchmarking-of-ai-compilers
1•chubot•38m ago•0 comments

Prevention of PTSD Symptoms in Soldiers Using Attention Bias Modification

https://psychiatryonline.org/doi/full/10.1176/appi.ajp.20250160
1•wslh•38m ago•0 comments