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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/

Show HN: Beats, a web-based drum machine

https://beats.lasagna.pizza
1•kinduff•1m ago•0 comments

Don't Lie

https://notes.philippdubach.com/0007
2•7777777phil•3m ago•0 comments

Police Invested Millions in Shadowy Phone-Tracking Software Won't Say How Used

https://www.texasobserver.org/texas-police-invest-tangles-sheriff-surveillance/
3•nobody9999•5m ago•1 comments

Agents Should Write Code, Not JSON

https://blog.sshh.io/p/building-multi-agent-systems-part-c0c
1•sshh12•6m ago•1 comments

The way I run standup meetings (2024)

https://marcgg.com/blog/2024/11/20/standup/
1•BerislavLopac•6m ago•0 comments

I vibecoded my way into the #1 position on the Highload.fun leaderboard

https://josusanmartin.com/blog/2026/01/18/the-game-has-changed-vibecoded-highload.html
1•josu•7m ago•0 comments

Simulating the Ladybug Clock Puzzle

https://austinhenley.com/blog/ladybugclock.html
1•ibobev•8m ago•0 comments

Writing an LLM from scratch, part 31 – the models are now on Hugging Face

https://www.gilesthomas.com/2026/01/llm-from-scratch-31-models-on-hugging-face
1•ibobev•8m ago•0 comments

I created a game engine for Django?

https://en.andros.dev/blog/6e9e4485/i-created-a-game-engine-for-django/
1•ibobev•8m ago•0 comments

ISS SOS: The plan to leave a doomed space station – quickly

https://www.bbc.com/future/article/20260115-how-do-you-evacuate-a-space-station
1•breve•12m ago•0 comments

Switch Join: PostgreSQL that adapts on the fly

https://alenarybakina.substack.com/p/switch-join-postgresql-that-adapts
1•tanelpoder•13m ago•0 comments

The Advanced Matrix Factorization Jungle

https://igorcarron.github.io/welcome-to-the-matrix-factorization-jungle/
1•jjgreen•14m ago•0 comments

Apple parental controls have more holes than Swiss cheese

https://twitter.com/MichaelErmer_/status/2012515535326527740
4•michaelermer•15m ago•0 comments

Thoughts and Observations Regarding Apple Creator Studio

https://daringfireball.net/2026/01/thoughts_and_observations_regarding_apple_creator_studio
3•k2enemy•16m ago•0 comments

Stirling Cycle Machine Analysis

https://ohioopen.library.ohio.edu/opentextbooks/9/
4•akshatjiwan•25m ago•0 comments

The AI Trap That Is Quietly Wiping Out Investors

https://substack.com/inbox/post/184956334
3•rafaepta•27m ago•1 comments

Show HN: Dock – Slack minus the bloat, tax, and 90-day memory loss

https://getdock.io/
2•yadavrh•28m ago•1 comments

The Future of AI Development Isn't a New IDE

https://docs.overcut.ai/blog/the-real-future-of-ai-development
1•yuvalhazaz•32m ago•0 comments

Show HN: HakHok

https://hakhok.replit.app/
1•sharjeel•32m ago•0 comments

The Agentic Software Development Lifecycle

https://docs.overcut.ai/blog/the-agentic-software-development-lifecycle
1•yuvalhazaz•32m ago•0 comments

Show HN: Stop manually syncing rules between Claude, Cursor, and Codex

https://github.com/nanxiaobei/ai-global
1•nanxiaobei•33m ago•0 comments

Which countries are adopting AI the fastest?

https://www.economist.com/graphic-detail/2026/01/12/which-countries-are-adopting-ai-the-fastest
2•gmays•34m ago•1 comments

Boston, NYC, Washington DC Guide

https://lopespm.com/notes/2026/01/18/nyc_boston_dc.html
1•lopespm•35m ago•0 comments

Show HN: VPNBypass – macOS menu bar app to route domains around your VPN

1•geiser•37m ago•0 comments

Bridging Bitchat and MeshCore

https://juraj.bednar.io/en/blog-en/2026/01/18/bridging-bitchat-and-meshcore-resilient-communicati...
1•hyzyla•37m ago•0 comments

psmux: Terminal multiplexer for Windows – tmux alternative

https://github.com/marlocarlo/psmux
1•curioussquirrel•38m ago•0 comments

Childhood Neighbors Influence Occupation Choice [pdf]

https://www.econ.queensu.ca/sites/econ.queensu.ca/files/neighbors_occupations_AHPW_aug1_2025.pdf
4•7777777phil•41m ago•3 comments

Ask HN: Predictions for New GTLDs in 2026?

1•cyode•42m ago•0 comments

An Introduction to Orthic

https://mutsumino.neocities.org/scripts/orthic
1•helterskelter•45m ago•0 comments

Train Journey across the USA [video]

https://www.youtube.com/watch?v=BbGljB4ikTs
1•notmysql_•46m ago•0 comments