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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/

I Designed a Custom Protocol for My App

https://blog.roj.dev/how-i-designed-a-custom-protocol-for-my-app
1•_roj•1m ago•0 comments

Show HN: I built a robot to win at Mario Party minigames

https://joshmosier.com/posts/deep-boo
1•photonboom•2m ago•0 comments

Sentry.io UI Is Down

https://status.sentry.io
1•vinnyglennon•3m ago•0 comments

Discussion paper: Driving effective carbon markets in Canada

https://www.canada.ca/en/environment-climate-change/corporate/transparency/consultations/comment-...
1•debo_•3m ago•0 comments

The End of the Orbital Index

https://orbitalindex.com/archive/2026-01-07-Issue-350/
1•debo_•4m ago•0 comments

Show HN: Two Rust books for developers who use AI coding assistants

https://fullstackrustapp.com
1•troelsfr•4m ago•0 comments

Alternatives to Terragon Labs

1•gekkostate•6m ago•0 comments

Show HN: Cloud Memory for Claude Code / Only for Code Reviews / Local ver OTW

1•vinkupa•9m ago•0 comments

I Was Anti-Imperialist Until I Wasn't

https://elimbi.com/fr/journal/civilization-organized-power/
3•sepiropht•9m ago•0 comments

Apple picks Google's Gemini to power Siri

https://www.cnbc.com/2026/01/12/apple-google-ai-siri-gemini.html
9•stygiansonic•12m ago•3 comments

The things I miss from the world

https://thehumansource.com/
3•salbertengo•13m ago•0 comments

Instagram breaks silence on mysterious password reset emails

https://www.indy100.com/viral/instagram-password-reset-emails-explained
1•iamben•13m ago•0 comments

Date is out, Temporal is in

https://piccalil.li/blog/date-is-out-and-temporal-is-in/
2•alexanderameye•14m ago•0 comments

Generating "Spot the Difference" Puzzles with AI

https://kamens.com/blog/generating-spot-the-difference-with-ai
1•kamens•15m ago•0 comments

The Exit

https://www.lesswrong.com/posts/kcoqwHscvQTx4xgwa/here-s-the-exit
1•notarobot123•15m ago•0 comments

Beyond Vector Search: Why LLMs Need Episodic Memory

https://philippdubach.com/posts/beyond-vector-search-why-llms-need-episodic-memory/
2•7777777phil•15m ago•0 comments

Ofcom launches investigation into X over Grok sexualised imagery

https://www.ofcom.org.uk/online-safety/illegal-and-harmful-content/ofcom-launches-investigation-i...
1•Signez•16m ago•0 comments

Anthropic Claude Healthcare Solutions

https://claude.com/solutions/healthcare
3•arutad•17m ago•0 comments

How to Make Indie Games in 2026 with Jonathan Blow [video]

https://www.youtube.com/watch?v=yNdRv5LFuQk
1•ibobev•18m ago•0 comments

Xous: A Pure-Rust Rethink of the Embedded Operating System [video]

https://media.ccc.de/v/39c3-xous-a-pure-rust-rethink-of-the-embedded-operating-system
3•PaulHoule•20m ago•0 comments

Computational Complexity of Schema-Guided Document Extraction

https://www.runpulse.com/blog/computational-complexity-of-schema
1•sidmanchkanti21•21m ago•0 comments

Show HN: I ported classic flash game Bloxorz to Game Boy Advance

https://github.com/jacobcoughenour/bloxorz_gba
2•jcoughenour•21m ago•0 comments

How You Detach Sticky Notes Affects How Well They Stay Attached

https://danverbraganza.com/writings/detach-well-to-attach-longer
1•nvader•23m ago•1 comments

I scraped 100k fishing reports to find a secret spot

https://www.meter.sh/blog/how-i-scraped-100k-fishing-posts
1•hankwilliamsjr•24m ago•0 comments

Computers that used to be human

https://digitalseams.com/blog/computers-that-used-to-be-human
1•bobbiechen•25m ago•0 comments

I have an idea I wanted to share with you all

https://github.com/orgs/community/discussions/184039
1•prassamin•25m ago•2 comments

Discussions with Purpose

https://finalsay.quest
1•cojunior•25m ago•0 comments

Palantir Crashes Out in Response to GN [video]

https://www.youtube.com/watch?v=5Idb_D4Tdu8
8•Klaster_1•26m ago•1 comments

Cast AI Valued at over $1B with the Launch of Its GPU Marketplace

https://cast.ai/press-release/cast-ai-valued-at-over-1-billion-with-the-launch-of-its-gpu-marketp...
2•pcsalad•26m ago•0 comments

Statement from Federal Reserve Chair

https://www.federalreserve.gov/newsevents/speech/powell20260111a.htm?mod=ANLink
3•nikhizzle•28m ago•1 comments