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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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: A real-time poker chip tracker built as a PWA (No signup required)

https://poker.beavergrow.com
1•jp1016•47s ago•1 comments

Apple Pay Could Arrive in India by the End of This Year

https://www.macobserver.com/news/apple-pay-could-arrive-in-india-by-the-end-of-this-year/
1•saikatsg•2m ago•0 comments

Farmer to Banker

https://twitter.com/Alfred_Lin/status/2011803782955540990
1•tosh•4m ago•0 comments

LastPass Users Targeted with Backup-Themed Phishing Emails

https://www.securityweek.com/lastpass-users-targeted-with-backup-themed-phishing-emails/
2•Bender•5m ago•0 comments

Claude session limits getting small

2•pragmaticalien8•9m ago•0 comments

HAM Radio Operators in Belarus Arrested, Face the Death Penalty

https://www.404media.co/ham-radio-operators-in-belarus-arrested-face-the-death-penalty/
2•cdrnsf•10m ago•0 comments

Show HN: Company hiring trends and insights from job postings

https://jobswithgpt.com/company-profiles/
1•sp1982•11m ago•0 comments

Building Google-Docs-like collaboration for an app used by millions (in Rust)

https://www.photoroom.com/inside-photoroom/building-google-docs-like-live-collaboration-for-a-cro...
2•ea016•11m ago•1 comments

Building a JavaScript runtime in one month

https://themackabu.dev/blog/js-in-one-month
1•theMackabu•12m ago•2 comments

Malicious ad blocker extension uses 'CrashFix' to spread new Python RAT

https://www.scworld.com/news/malicious-ad-blocker-extension-uses-crashfix-to-spread-new-python-rat
1•Bender•12m ago•0 comments

Show HN: RLM-MCP Analyze Files in Claude Code Using MIT's recursive LM paper

1•ahmedm24•13m ago•1 comments

Malan Chat, the full immersion AI-powered language learning app for 62 languages

https://www.malan.chat
2•sam_osterfeld•14m ago•1 comments

Email design after legacy Outlook is phased out

https://blocksedit.com/content-code/modern-email-design/
1•ovidem•14m ago•0 comments

Show HN: TetrisBench – AI vs. AI vs. Human Tetris using realtime code generation

https://tetrisbench.com/
1•ykhli•15m ago•0 comments

Tom Lehrer (1928–2025): A (Mostly) Mathematical Appreciation

https://www.ams.org/journals/notices/202602/noti3297/noti3297.html
2•stmw•16m ago•0 comments

Show HN: Building a future where security checks leave no permanent trails

1•csp_dev•18m ago•1 comments

Concorde at 50: Twice the speed of sound, twice the economic trouble

https://www.theregister.com/2026/01/21/50_years_concorde/
2•LorenDB•21m ago•0 comments

NoFap sues Pornhub under RICO Act, alleges global disinformation campaign

https://www.prnewswire.com/news-releases/nofap-sues-pornhub-under-rico-act-alleges-collusion-with...
2•jackfischer•21m ago•0 comments

Quantum physicists create largest ever 'superposition'

https://www.nature.com/articles/d41586-026-00177-9
3•digital55•22m ago•0 comments

You're Living in the Chinese Century

https://www.wired.com/china-issue/
5•mefengl•22m ago•0 comments

Apple's product plans stolen in Luxshare cyberattack

https://www.macrumors.com/2026/01/21/apple-product-plans-stolen-in-luxshare-cyberattack/
4•gloxkiqcza•22m ago•0 comments

illumos

https://illumos.org/
12•tosh•23m ago•0 comments

LWN Is Down

https://lwn.net/
1•WesolyKubeczek•24m ago•1 comments

My website is my custom feed reader

https://squeaki.sh/p/i-turned-my-website-into-my-feed-reader/
1•steffoz•25m ago•1 comments

MathGPT Graphing: fast interactive graphs with AI help

https://mathgpt.today/graphing
1•umeedsto•26m ago•2 comments

Show HN: A RSVP Reader for Articles

https://www.readfast.co/
1•Mitchell2398•26m ago•0 comments

Slouching Towards Bethlehem – Joan Didion (1967)

https://www.saturdayeveningpost.com/2017/06/didion/
1•jxmorris12•27m ago•0 comments

Attention Authors: updated endorsement policy

https://blog.arxiv.org/2026/01/21/attention-authors-updated-endorsement-policy/
1•50kIters•27m ago•0 comments

How do you keep AI-generated applications consistent as they evolve over time?

1•RobertSerber•29m ago•0 comments

Show HN: Why single agents suck at math proofs

https://ensue.dev/blog/stop-throwing-a-single-agent-at-complex-problems/
3•austinbaggio•33m ago•1 comments