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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

Show HN: Book Collage Creator

https://inktide.app/collage
1•sd9•27s ago•0 comments

Rise of the Writer

https://schwadlabs.io/blog/rise-of-the-writer
1•schwad•37s ago•0 comments

Lenovo's New ThinkPads Score 10/10 for Repairability

https://www.ifixit.com/News/115827/new-thinkpads-score-perfect-10-repairability
1•wrxd•1m ago•0 comments

Designing Secure Software

https://designingsecuresoftware.com/text/ch0-preface/
1•transpute•2m ago•0 comments

Show HN: Git-hunk – Stage hunks by hash, no "-p" required

https://git-hunk.paulie.app/
1•shhac•3m ago•0 comments

Checkers and Hex

https://www.glassgallows.com/p/checkers-and-hex
1•mortarjjjjj•3m ago•0 comments

Show HN: Autonomous Agent That Uses Your Tools Without Complex Setups

https://heycody.ink
1•daolm•4m ago•0 comments

Improving skill-creator: Test, measure, and refine Agent Skills

https://claude.com/blog/improving-skill-creator-test-measure-and-refine-agent-skillst
1•adocomplete•4m ago•0 comments

NTSB: Automated Driving Vehicle Passed School Bus Loading Student Passengers

https://www.ntsb.gov:443/investigations/Pages/HWY26FH007.aspx
1•Animats•5m ago•1 comments

Buddhist concept of suffering explained with AI generated video and music (HQ)

https://www.youtube.com/watch?v=Vyq0kbjFjdA
1•jahala•5m ago•1 comments

'Silicon Valley's only contrarian': Amjad Masad on the cost of dissent in tech

https://sfstandard.com/pacific-standard-time/2026/02/27/pst-amjad-masad-silicon-valley-contrarian/
1•abdelhousni•6m ago•1 comments

File extensions in bash scripts – shell parameter expansion

https://www.johndcook.com/blog/2026/02/28/file-extensions-bash/
1•ibobev•7m ago•0 comments

Show HN: Spidra – AI web scraper that adapts to any website

https://spidra.io
1•joelolawanle•7m ago•0 comments

I lost my ability to learn anything new because of AI and I need your opinions

2•dokdev•7m ago•4 comments

Shell Variable

https://www.johndcook.com/blog/2026/03/01/tilde-dash/
2•ibobev•7m ago•0 comments

Differential Equation with a Small Delay

https://www.johndcook.com/blog/2026/03/02/small-delay/
1•ibobev•7m ago•0 comments

Privacy Protections Shouldn't Depend on the Decisions of a Few Powerful People

https://www.eff.org/deeplinks/2026/03/anthropic-dod-conflict-privacy-protections-shouldnt-depend-...
1•hn_acker•10m ago•1 comments

The Product Engineer

https://nmm.ee/product-engineer
1•askonomm•11m ago•0 comments

Supreme Court saves artists from AI

https://pluralistic.net/2026/03/03/its-a-trap-2/
3•hn_acker•12m ago•0 comments

Background Coding Agents: Predictable Results Through Strong Feedback Loops

https://engineering.atspotify.com/2025/12/feedback-loops-background-coding-agents-part-3
1•chw9e•15m ago•0 comments

Claude Is a Virtual Machine / Runtime Engine / JIT

https://jperla.com/blog/claude-is-a-jit
1•ljlolel•16m ago•0 comments

How Well Does Agent Development Reflect Real-World Work?

https://arxiv.org/abs/2603.01203
1•salkahfi•17m ago•0 comments

130k Lines of Formal Topology: Simple and Cheap Autoformalization for Everyone?

https://arxiv.org/abs/2601.03298
1•PaulHoule•18m ago•0 comments

Motorola's GrapheneOS phones: They're a privacy and open source win

https://www.zdnet.com/article/motorola-to-preinstall-grapheneos-on-2027-phones/
2•CrankyBear•18m ago•0 comments

Emacs Bedrock

https://codeberg.org/ashton314/emacs-bedrock
2•thomascountz•20m ago•0 comments

OpenCode-lore: Stop re-explaining your codebase

https://github.com/BYK/opencode-lore
1•BYK•21m ago•1 comments

Slung: Stream processing runtime for autonomous systems

https://slung.tech/blog/intro
1•notxorand•21m ago•0 comments

EEmicroGPT: 19,000× faster microgpt training on a laptop CPU (loss vs. time)

https://entrpi.github.io/eemicrogpt/
2•easygenes•22m ago•1 comments

Saudi Arabia, Qatar arrest Mossad agents planning 'terror attacks': Report

https://thecradle.co/articles-id/36258
6•abdelhousni•24m ago•0 comments

Talos: Hardware accelerator for deep convolutional neural networks

https://talos.wtf/
4•llamatheollama•24m ago•0 comments