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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/

I made a browser game that teaches tmux

https://tmuxquest.com/
1•buzzycat•47s ago•0 comments

Trophic memory, deer, and a unique scientific object

https://thoughtforms.life/trophic-memory-deer-and-a-truly-unique-scientific-object/
1•BafS•2m ago•0 comments

Ask HN: Are your hidden links missing?

1•toomuchtodo•5m ago•0 comments

Mass Layoffs Caused by AI

https://olegdubovoi.com/thoughts/2026-06-04-mass-layoffs-caused-by-ai/
2•empiree•5m ago•0 comments

I ported Xonotic (arena FPS) to WebAssembly

https://dpgame.xonotic.workers.dev/
4•astlouis44•8m ago•1 comments

Looking for Backdoors in Jane Street LLMs

https://www.alignmentforum.org/posts/a98MFPmqH54J2ayBn/looking-for-backdoors-in-jane-street-llms-1
2•allenleee•9m ago•0 comments

Claude, Teach Me Something

https://hugotunius.se/2025/10/26/claude-teach-me-something.html
1•dannyboland•12m ago•1 comments

We Forget

https://quinnmaclay.com/posts/forget
1•speckx•16m ago•0 comments

Ntsc-rs – open-source video emulation of analog TV and VHS artifacts

https://ntsc.rs/
4•gregsadetsky•20m ago•0 comments

Hermes – Community Web UI with Agent

https://get-hermes.ai/
1•SeriousM•22m ago•0 comments

Show HN: CCC: One place to manage all your Claude, Codex, Antigravity sessions

https://github.com/amirfish1/claude-command-center
1•amirfish2•22m ago•0 comments

posix_spawn syscall added (2012)

https://blog.netbsd.org/tnf/entry/posix_spawn_syscall_added
1•JdeBP•22m ago•0 comments

AI Memory Proves Inefficient: Tenure Project Detects 95% Error Rate

https://zamin.uz/en/technology/205592-ai-memory-proves-inefficient-tenure-project-detects-95-erro...
4•jflynt76•24m ago•0 comments

The dark origins of Disney fairy tales [video]

https://www.youtube.com/watch?v=pyDZpDkU46Y
2•gmays•25m ago•0 comments

Readers' top novels of all time

https://www.theguardian.com/books/ng-interactive/2026/jun/06/readers-top-100-novels-of-all-time
1•fallinditch•25m ago•0 comments

Exitus: Travel Advisor

https://exitusadvisor.org/
2•polysw•29m ago•0 comments

iSave – A budgeting app that works without linking your bank

https://i-save.app/
1•xhafaaldi•29m ago•0 comments

Show HN: Competitive Programmer's Web Debugger

https://klyroni.com
1•s3arch•36m ago•0 comments

Rayforce

https://github.com/RayforceDB/rayforce
1•tosh•36m ago•0 comments

Leaks reveal US authorities concerned about the rise of 'anti-tech extremists'

https://www.tomshardware.com/tech-industry/artificial-intelligence/leaks-reveal-us-authorities-co...
3•rolph•36m ago•3 comments

IOCCC29 Awards Presentation and Source Code Reveal [video]

https://www.youtube.com/watch?v=MoWCwZx1Swc
1•s-macke•37m ago•0 comments

Project Euler 1000

https://projecteuler.net/problem=1000
3•pazqo•37m ago•1 comments

USSH: A shell protocol and client/server pair built on top of USTP-Secure

https://github.com/x1colegal/ussh
1•thunderbong•39m ago•0 comments

WebMCP Registry – a public index for WebMCP tool contracts

https://webmcp-registry.dev
2•plural•39m ago•0 comments

HIPAA Compliance – Shieldra.ai is live

https://www.shieldra.ai/
1•shieldra•40m ago•0 comments

Zapros: Modern and extensible HTTP client for Python

https://zapros.dev
1•karpetrosyan•41m ago•0 comments

ASML employees threaten to boycot internal event over possible Musk appearence

https://nos.nl/artikel/2617421-asml-medewerkers-dreigen-met-boycot-intern-evenement-na-uitnodigin...
4•28304283409234•42m ago•0 comments

The Missing Value of Data [pdf]

https://business.columbia.edu/sites/default/files-efs/citation_file_upload/BOVDataGDP_Dec2025_v2.pdf
1•neehao•44m ago•0 comments

The Sierpiński triangle ideal of Internet bandwidth for applications

https://inavoyage.blogspot.com/2026/06/the-sierpinski-triangle-ideal-of.html
1•initramfs•49m ago•0 comments

31gb to 4gb: Rust vector index based on TurboQuant

https://github.com/RyanCodrai/turbovec
1•nico•50m ago•0 comments