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Bloom's two sigma problem (2020)

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

Comments

trane_project•12mo 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/

West Coast Cities Turn to Vacancy Taxes to Grapple with Housing Crisis

https://www.theurbanist.org/west-coast-cities-turn-to-vacancy-taxes-to-grapple-with-housing-crisis/
1•harambae•1m ago•0 comments

Rank My Salary

https://rankmysalary.com
1•zakkishahh•2m ago•0 comments

A collection of small, low stakes and low effort tools

https://delphi.tools/
1•anyonecancode•2m ago•0 comments

Ask HN: I only use 30% of my Claude max x5 all model quota

1•firemelt•3m ago•0 comments

Cheap attack drones break through Israel's Iron Dome

https://www.dw.com/en/cheap-attack-drones-break-through-israels-iron-dome/a-77235132
1•Teever•5m ago•0 comments

Machine Code For Beginners (1983) [for the Z80/6502]

https://drive.google.com/file/d/0Bxv0SsvibDMTcHNXalEtYkVtU00/view?resourcekey=0-YtCcUG7ytBL-ls8gc...
2•peter_d_sherman•6m ago•0 comments

AI poses "urgent threat" to student learning and the HSC

https://www.smh.com.au/national/nsw/ai-poses-urgent-threat-to-student-learning-and-the-hsc-202605...
1•classichasclass•7m ago•0 comments

Spoqify – Un-personalize your Spotify playlists

https://spoqify.com/
3•eiiot•12m ago•0 comments

Curing US Healthcare, Part III: The Future

https://paulkrugman.substack.com/p/curing-us-healthcare-part-iii-the
1•rbanffy•14m ago•0 comments

Show HN: Simple Sprite Sheet Generation

https://github.com/acatovic/ai-game-studio
1•armcat•16m ago•0 comments

The political polarization of health outcomes in the USA

https://www.nature.com/articles/s41562-026-02474-9
2•geox•17m ago•0 comments

Show HN: 18 y/o – built the world's first behavioural intelligence platform

https://www.assemblr.net/
1•adityahv•19m ago•0 comments

Ask HN: Why didn't the C64 come with Simons' BASIC in the box from 1983 onward?

1•amichail•19m ago•0 comments

Why Physical Reality Is a Collective Construction

https://mimetra.com/blog/consciousness-fusion/
2•mw67•20m ago•0 comments

I am not a black belt

https://rodolphoarruda.pro.br/i-am-not-a-black-belt/
2•rodolphoarruda•22m ago•0 comments

The Leader of NASA's Artemis II Mission Is Still Moonstruck

https://www.newyorker.com/news/the-new-yorker-interview/the-leader-of-nasas-artemis-ii-mission-is...
1•fortran77•22m ago•0 comments

Show HN: Worldnotes – infinite notes in-browser canvas

https://github.com/AlexMason/worldnotes
1•recursivegirth•24m ago•0 comments

Machine: Never run NPM install on your computer

https://runmachine.dev/
1•katspaugh•24m ago•0 comments

Object-Store Native Databases

https://www.opendata.dev/docs
1•alex_hirner•26m ago•1 comments

The Next Computer Is Alive

https://www.reloadnyc.com/the-ai-shuffle/
2•smesser•28m ago•0 comments

Show HN: Brew-browser – A native macOS GUI for Homebrew

https://github.com/msitarzewski/brew-browser
1•msitarzewski•29m ago•0 comments

Did Amphetamines Help Erdős?

https://aleph.se/andart2/math/did-amphetamines-help-erdos/
1•wslh•30m ago•0 comments

The AI Bifurcation of Tech: Why the fundamentals matter more

https://neevash.com/blog/tech-bifurcation-and-the-0.5-layer
2•Nash0x7e2•31m ago•1 comments

A History of Obituaries in American Newspapers

https://blogs.loc.gov/headlinesandheroes/2026/05/mourn-not-a-history-of-obituaries-in-american-ne...
1•NaOH•31m ago•0 comments

Decree 770

https://en.wikipedia.org/wiki/Decree_770
1•mmh0000•32m ago•0 comments

Study of AI use by undergrads revealing disparities in access – and in cheating

https://news.berkeley.edu/2026/05/21/the-largest-study-of-ai-use-by-undergrads-is-in-revealing-di...
1•ChrisArchitect•32m ago•1 comments

When Generation Becomes Cheap, Selection Becomes Governance

https://lospino.so/blog/sunday-field-notes/the-workshop-has-changed/
2•jalospinoso•34m ago•0 comments

DHS says ICE has 'no relationship' with spyware maker Paragon Solutions

https://www.npr.org/2026/05/22/nx-s1-5831577/dhs-ice-spyware-paragon
3•devonnull•35m ago•0 comments

San Francisco Buried Treasure Has Been Found. Stop Hunting

https://www.buriedtreasuresf.com/solution
3•ChrisArchitect•36m ago•1 comments

Designing Event-Driven EVM Monitoring Systems

https://blog.bridgexapi.io/designing-event-driven-evm-monitoring-systems
1•Bridgexapi•38m ago•0 comments