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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

LinguaHover – Hover Any Word, Translate Instantly – Chrome Extension

https://chromewebstore.google.com/detail/linguahover-translator-pr/dnkpfkopeeilpfgnehheceebamlcbcgc
1•titan_tokyo•2m ago•0 comments

Show HN: Mochi Analytics

https://www.mochianalytics.com
1•devtanna•3m ago•0 comments

Ask HN: Do you like your AI more than your coworker?

1•general_reveal•3m ago•0 comments

In the Weights

https://intheweights.com
1•dash2•6m ago•0 comments

Bounding the Blast Radius: A Survey of Prompt-Injection Defenses for LLM Agents

https://fabraix.com/blog/nobody-has-solved-prompt-injection
1•ibrahim_abdu777•7m ago•0 comments

What Happens When AI Agents Can Pay Their Own Bills

https://self-sovereign-agent.github.io/
1•_pdp_•12m ago•0 comments

Higher blood glucose levels linked to faster brain aging

https://medicalxpress.com/news/2026-07-higher-blood-glucose-linked-faster.html
1•XzetaU8•12m ago•0 comments

Supply Chain Attack Campaign PolinRider

https://socket.dev/supply-chain-attacks/polinrider
1•_____k•13m ago•0 comments

Poll: Is there an AI bubble?

1•networked•14m ago•1 comments

Generative AI without guardrail can harm learning:Evidence from high school math

https://www.pnas.org/doi/10.1073/pnas.2422633122
1•teleforce•14m ago•0 comments

Tribe in Colorado brings utility scale solar project online

https://www.npr.org/2026/07/06/nx-s1-5779756/despite-stiff-political-headwinds-tribe-in-colorado-...
2•geox•19m ago•0 comments

Claude Code deletes conversations after 30 days

1•mieubrisse•19m ago•0 comments

Adding Homemade TLS to a Homemade Web Server

https://www.dmytrohuz.com/p/adding-homemade-tls-to-a-homemade
1•dmyhuz•24m ago•0 comments

Euclid scientists discover most distant known quasars

https://www.euclid-ec.org/most-distant-quasars/
1•robin_reala•25m ago•0 comments

Ask HN: What is your go-to prompt to prove AI can be wrong?

1•throwaway_887•27m ago•0 comments

Ask HN: Do you guys struggle with finding a right person for your FDE role?

1•getelementbyiq•34m ago•0 comments

Experts offer advice on performing endurance events in excessive heat

https://news.northeastern.edu/2026/07/02/cycling-in-extreme-heat-tour-de-france/
1•ano-ther•35m ago•0 comments

Read Rust Like a Chinese Character

https://dawaba.pages.dev/writing/sometimes-read-rust-like-a-chinese-character/
1•saint-evan•36m ago•1 comments

A Self-Improving Code World Model Agent

https://jdsemrau.substack.com/p/a-self-improving-code-world-model
1•ph4rsikal•39m ago•0 comments

Show HN: Kiwi – Run agentic dev loops in the cloud, keep keys on your laptop

https://github.com/ibreakthecloud/kiwi
1•harshvkarn•40m ago•0 comments

Plex debuts 5-year membership pass for $250

https://arstechnica.com/gadgets/2026/07/250-used-to-get-you-a-lifetime-plex-pass-now-you-get-a-fi...
1•AndrewDucker•40m ago•0 comments

Australia prosecuting Amazon for unilaterally modifying Prime terms [video]

https://www.youtube.com/watch?v=DV2-GLJ2FnM
1•dataflow•43m ago•1 comments

Show HN: I built notion database based no code form builder

https://ndbforms.myurll.in/
1•nookeshkarri7•44m ago•0 comments

The Hitchhiker's Guide to Agentic AI

https://arxiv.org/abs/2606.24937
2•jonbaer•44m ago•0 comments

Show HN: TV Time to Serializd Importer

https://chromewebstore.google.com/detail/tv-time-→-serializd-impor/cpcfkgcidilfibakiaohbekkanlk...
1•Gooblebrai•44m ago•0 comments

your competitor is 10x better than you

https://www.mentionedby.world/
2•aykhanstoic•48m ago•1 comments

What else happened in 1776 [video]

https://www.youtube.com/watch?v=nGMCowI4exk
1•iansteyn•48m ago•0 comments

Venice AI becomes a unicorn with its privacy-first AI platform takes off

https://techcrunch.com/2026/07/01/venice-ai-becomes-a-unicorn-with-65m-series-a-as-its-privacy-fi...
2•felixdoerp•51m ago•0 comments

China fires ballistic missile into Pacific nuclear-free zone

https://www.ft.com/content/c52f0a98-2e6a-4acc-a668-d4ce442c4aba
2•cwwc•53m ago•0 comments

Roll your own file-based router in under 50 lines of code

https://wasp.sh/blog/2026/07/01/roll-your-own-file-based-router
1•cprecioso•53m ago•0 comments