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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

A Complete Visual Tour of the First WordPress Release

https://iterativewonders.com/2025/12/04/a-complete-visual-tour-of-the-first-wordpress-release-ever/
1•Kerrick•54s ago•0 comments

Netflix agrees to buy Warner Bros Discovery studio in 83B deal

https://www.theguardian.com/business/2025/dec/05/netflix-frontrunner-warner-bros-discovery-stream...
1•tosh•1m ago•0 comments

Privacy People- a Documentary About Privacy and the Privacy Profession

https://www.youtube.com/watch?v=EqZOzwVaZp8
1•bteamfilms•3m ago•1 comments

An AI for an AI: Anthropic says AI agents require AI defense

https://www.theregister.com/2025/12/05/an_ai_for_an_ai/
1•speckx•6m ago•0 comments

The Data on Self-Driving Cars Is Clear. We Have to Change Course

https://www.nytimes.com/2025/12/02/opinion/self-driving-cars.html
1•fortran77•7m ago•2 comments

The Big Blind

https://avc.xyz/the-big-blind
1•wslh•7m ago•0 comments

Show HN: Notekit – A Privacy-First Note-Taking Extension for Chrome

https://chromewebstore.google.com/detail/notekit-smart-note-taking/odlainjhjhfffelembfofofpebneonfn
1•kamdev•11m ago•0 comments

The Surprisingly Complicated World of SMS: Emoji SMS Reactions

https://nickvsnetworking.com/the-surprisingly-complicated-world-of-sms-emoji-sms-reactions/
1•speckx•11m ago•0 comments

Emacs Is My New Window Manager

https://www.howardism.org/Technical/Emacs/new-window-manager.html
1•gpi•12m ago•0 comments

Simplicity of a Database, but the Speed of a Cache: OLAP Caches for DuckDB

https://motherduck.com/blog/duckdb-olap-caching/
1•articsputnik•13m ago•0 comments

Error Handling Patterns (2023)

https://andreabergia.com/blog/2023/05/error-handling-patterns/
1•Wingy•13m ago•0 comments

Show HN: Kronos – Type-safe trading framework in Go with terminal UI

https://github.com/backtesting-org/kronos
1•lkwtsn•14m ago•0 comments

Agent Client Protocol (ACP) Lands to JetBrains IDEs

https://blog.jetbrains.com/ai/2025/12/bring-your-own-ai-agent-to-jetbrains-ides/
2•ignatovs•15m ago•1 comments

Show HN: PastScreen – open-source macOS screenshot tool that grabs file paths

https://github.com/augiefra/PastScreen
1•augiefra•15m ago•1 comments

Search 11,000 amendments to the U.S. Constitution proposed between 1789 and 2022

https://amendmentsproject.org/about
1•keepamovin•16m ago•0 comments

Show HN: PGM-Extra – High-performance learned index structures for Rust

https://github.com/itsfoxstudio/pgm-extra-rs
1•rpunkfu•16m ago•0 comments

Show HN: Losselot – See if your FLACs are fibbing, catch encoding audio relics

https://github.com/notactuallytreyanastasio/losselot
1•rhgraysonii•18m ago•0 comments

When Product Markets Become Collective Traps: The Case of Social Media

https://www.aeaweb.org/articles?id=10.1257/aer.20231468
1•tomrod•19m ago•1 comments

Free Gemini Watermark Remover

https://geminiwatermark.online
2•ocmaker•19m ago•0 comments

Show HN: A tool to visualize and map dependency hell in legacy COBOL codebases

https://apps.microsoft.com/detail/9n1b6m4fz1c8?hl=en-US&gl=US
1•NabilChiheb•21m ago•0 comments

First English language slang dictionary (1698)

https://languagelog.ldc.upenn.edu/nll/?p=72066
1•bookofjoe•21m ago•0 comments

CSS Fizz Buzz

https://susam.net/css-fizz-buzz.html
1•blenderob•23m ago•0 comments

The "soft" racism of the well-meaning white liberal, myself included

https://ncte.org/blog/2017/12/soft-racism-well-meaning-white-liberal-included/
3•volemo•26m ago•1 comments

Rad: Modern CLI scripts made easy

https://github.com/amterp/rad
1•nateb2022•27m ago•0 comments

The lethal trifecta and how to defend against it

https://hiddenlayer.com/innovation-hub/the-lethal-trifecta-and-how-to-defend-against-it/
1•beabytes•28m ago•0 comments

Influential study on glyphosate safety retracted 25 years after publication

https://www.lemonde.fr/en/environment/article/2025/12/03/influential-study-on-glyphosate-safety-r...
6•isolli•29m ago•0 comments

CLI tool to hop between AI CLI tools

2•gtomicognjen•29m ago•0 comments

Show HN: PaperProfit – learn investing and trading by doing

https://github.com/pg1/paper-profit
2•pg1•29m ago•0 comments

Track hours, projects, and invoice with ease

https://worktracks.xyz
2•M0HD197•31m ago•2 comments

Supabase for Platforms

https://supabase.com/blog/introducing-supabase-for-platforms
1•adamfeldman•32m ago•0 comments