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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/

To sign or not to sign: Practical vulnerabilities in GPG and friends

https://fahrplan.events.ccc.de/congress/2025/fahrplan/event/to-sign-or-not-to-sign-practical-vuln...
1•RGBCube•1m ago•0 comments

Identity Theft in AI Conference Peer Review

https://cacm.acm.org/opinion/identity-theft-in-ai-conference-peer-review/
1•pcfwik•8m ago•0 comments

Build Android apps using Rust and iced

https://github.com/ibaryshnikov/android-iced-example
1•rekireki•9m ago•1 comments

Show HN: I built a zero-config CLI to stop leaked secrets locally

https://www.accord-os.com/
1•mrsoltan•10m ago•0 comments

Power and Greed Ruined Adobe

https://www.youtube.com/watch?v=OtYNmANylro
1•fallinditch•17m ago•0 comments

Amazon Is Filled with AI Book Slop

https://www.rollingstone.com/culture/culture-features/amazon-ai-book-knockoffs-1235450690/
4•chrsw•22m ago•1 comments

Generic Compression Benchmark

https://www.mattmahoney.net/dc/uiq/
2•optimalsolver•28m ago•0 comments

Bedlam Cube Solved (ALL 19,186 solutions)

http://scottkurowski.com/BedlamCube/
1•kristianp•34m ago•0 comments

Google wants to study your online habits; what it wants to track

https://www.boston25news.com/news/local/google-wants-study-your-online-habits-what-it-wants-track...
1•1vuio0pswjnm7•37m ago•0 comments

The Legend of Zelda: Twilight Princess 100.00% Decompilation

https://decomp.dev/zeldaret/tp
2•Lammy•39m ago•1 comments

Self Improving Text2Sql Agent with Dynamic Context and Continuous Learning

https://www.ashpreetbedi.com/articles/sql-agent
1•gmays•39m ago•0 comments

86Box v5.3

https://86box.net/2025/12/21/86box-v5-3.html
7•chungy•40m ago•0 comments

The Origins of APL (1974) [video]

https://www.youtube.com/watch?v=8kUQWuK1L4w
1•ofalkaed•40m ago•0 comments

Logging Is a Code Smell

https://dave.autonoma.ca/blog/2022/01/08/logging-code-smell/
3•handfuloflight•40m ago•1 comments

The Bedlam Cube's inventor, Bruce Bedlam, on staying creative

https://www.mojo-nation.com/the-bedlam-cubes-inventor-bruce-bedlam-on-staying-creative-and-why-qu...
2•kristianp•56m ago•0 comments

Man boards flight without ticket, boarding pass or passport in security breach

https://www.standard.co.uk/news/transport/london-heathrow-airport-flight-ticket-boarding-pass-pas...
2•SanjayMehta•56m ago•0 comments

Danish postal service to stop delivering letters after 400 years

https://www.theguardian.com/world/2025/dec/21/denmark-postnord-postal-delivery-letters-society
18•hackerbeat•58m ago•6 comments

Sunrise and Sunset Times Near the Solstices

https://aa.usno.navy.mil/faq/rs_solstices
1•pitfield•1h ago•0 comments

Show HN: MinecraftLM – Build Procedural 3D Minecraft Worlds

https://github.com/mattzh72/minecraftlm
2•avinashj•1h ago•0 comments

The next Bill Gates will be a 13-year-old who is vibe coding

https://fortune.com/article/what-is-vibe-coding-alexandr-wang-bill-gates-meta/
2•sherlockxu•1h ago•1 comments

Build your own RSS daily digest using GitHub Actions/Pages in 5 minutes

https://github.com/piqoni/go-digest
2•lexoj•1h ago•0 comments

Amazon's big AGI reorg decoded

https://www.theregister.com/2025/12/17/jassy_taps_peter_desantis_to_run_agi/
3•gmays•1h ago•0 comments

Private Presentations Aren't Proof

https://blog.wizsec.jp/2021/07/ppap.html
2•mercurybee•1h ago•0 comments

Debian's Git Transition

https://diziet.dreamwidth.org/20436.html
1•todsacerdoti•1h ago•0 comments

Ask HN: Allow AI use during job interviews?

3•realclayman•1h ago•0 comments

World Health Organization to explore benefits of traditional medicines

https://www.theguardian.com/global-development/2025/dec/20/who-traditional-medicine-alternative-r...
3•0in•1h ago•0 comments

New research project uses sound to protect native birds from cats

https://www.rnz.co.nz/news/national/582420/new-research-project-uses-sound-to-protect-native-bird...
2•akiba•1h ago•1 comments

PortalVR lets you play VR content without wearing a headset

https://portalvr.io/how_to_play
1•gfodor•1h ago•0 comments

Show HN: Real-time SF 911 dispatch feed (open source)

https://sfpoliceblotter.com
2•1zael•1h ago•0 comments

Show HN: Nanji – A minimal Rust CLI for timezone conversion

https://github.com/hoqqun/nanji
1•hokuut•1h ago•2 comments