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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/

Model-Harness-Fit

https://nicolasbustamante.com/blog/model-harness-fit
1•azhenley•27s ago•0 comments

Canvas (Instructure) LMS Down in Ongoing Ransomware Attack

https://www.theverge.com/tech/926458/canvas-shinyhunters-breach
1•stefanpie•1m ago•0 comments

Hackers deface school login pages after claiming another Instructure hack

https://techcrunch.com/2026/05/07/hackers-deface-school-login-pages-after-claiming-another-instru...
3•Veiled•8m ago•0 comments

AWS gives AI agents wallets to pay for APIs and web content

https://aws.amazon.com/blogs/machine-learning/agents-that-transact-introducing-amazon-bedrock-age...
3•logickkk1•12m ago•0 comments

Canvas hack shuts down operations at UW-Madison, worldwide

https://www.dailycardinal.com/article/2026/05/canvas-hack-shuts-down-operations-at-uw-madison-wor...
2•isaacdl•14m ago•0 comments

Why Don't Lowercase Letters Come Right After Uppercase Letters in ASCII?

https://tylerhillery.com/blog/why-dont-lowercase-chars-come-after-upper/
4•alpaylan•16m ago•0 comments

How a Congressional Primary Became a Proxy Battle over A.I.

https://www.newyorker.com/news/our-local-correspondents/how-a-congressional-primary-became-a-prox...
3•mitchbob•18m ago•1 comments

Aztec Codex

https://en.wikipedia.org/wiki/Aztec_codex
2•soupspaces•20m ago•0 comments

RNA-triggered cell killing with CRISPR-Cas12a2

https://www.nature.com/articles/s41586-026-10466-y
2•manuelr-t•21m ago•1 comments

Show HN: Disputron – AI small claims court for petty disputes

https://disputron.ai
3•etaheri•23m ago•1 comments

Show HN: Built a Public Journal for Builders

https://joinserendipity.co/
2•ldang•26m ago•1 comments

US launches new strikes on Iran

https://www.ft.com/content/21131ff4-35e1-4e5c-b827-1e07c9153e8e
8•JumpCrisscross•27m ago•0 comments

French prosecutors seek charges against Musk/X over child sexual abuse images

https://apnews.com/article/france-x-grok-deepfakes-child-sexual-abuse-charges-cac04b1869201bb4c9d...
3•afavour•29m ago•0 comments

Cybercrime group crashes Penn's Canvas system

https://www.thedp.com/article/2026/05/penn-canvas-shinythunters-data-breach-hack-second
2•bgschulman31•32m ago•0 comments

Family Deserves a Lasting Legacy

https://kleinlegacywealth.pro/
2•misterthp•33m ago•0 comments

Not fight, flight or freeze, but fawn

https://psyche.co/notes-to-self/not-fight-flight-or-freeze-this-is-what-fawning-looks-like
3•herbertl•33m ago•0 comments

blink-dev: Intent to Ship: Prompt API

https://groups.google.com/a/chromium.org/g/blink-dev/c/iR6R7-nQeHI?pli=1
2•xg15•33m ago•0 comments

We built autoresearch for browser agents

https://www.browserbase.com/blog/autobrowse
2•Kylejeong21•34m ago•0 comments

Show HN: No More Deepfakes – A Ramanujan 1/π and Nvidia B200 Architecture

https://zenodo.org/records/20065581
2•Prakash_1•35m ago•0 comments

Left-Right Handedness Asymmetry in Snail Shells (2004)

https://www.sciencedirect.com/science/article/pii/S0960982204005901
2•bookofjoe•35m ago•0 comments

My Claude dreams at night and remembers everything. Better than mempalace

https://github.com/CodeAbra/iai-mcp
2•CodeAbra•36m ago•0 comments

Fire at Dutch NorthC data center, all personnel evacuated in time

https://www.techzine.eu/news/infrastructure/141131/fire-at-northc-data-center-all-personnel-evacu...
3•notorandit•36m ago•1 comments

What do AI based layoffs say about their ability to scale?

https://www.elliotcsmith.com/what-do-ai-based-layoffs-say-about-tam/
2•smitec•38m ago•0 comments

How many of us are evaling our skills?

https://github.com/BintzGavin/apastra
2•GavinBintz•38m ago•0 comments

Attacking your competitors online is dumb

https://posthog.com/blog/why-attacking-competitors-is-dumb
3•herbertl•42m ago•0 comments

Reality emerges: What is the Universe made of?

https://aeon.co/essays/why-reality-is-more-than-the-sum-of-its-particles
2•herbertl•46m ago•0 comments

Ask HN: Are we observing the death of social networks?

4•fullstacking•46m ago•5 comments

thoughts on Gen AI's frontier of individuality

3•audreyfei•47m ago•0 comments

US trade court rules against Trump's 10% global tariffs

https://www.reuters.com/world/us-trade-court-rules-against-trumps-10-global-tariff-2026-05-07/
7•JumpCrisscross•49m ago•0 comments

Marc Andreessen Egg Game

https://marc-egg.eieio.games/
3•HotGarbage•49m ago•0 comments