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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

Measles surge in Utah sparks fears US could undo decades of progress

https://www.dailymail.com/news/article-15897903/measles-surge-utah-US-elimination-status.html
1•Bender•9s ago•0 comments

Pouta Forms, open-source alternative to TypeForm

https://github.com/pouta-cms/form
1•mohanjith•28s ago•0 comments

Parsing JSON at compile time with C++26 static reflection

https://lemire.me/blog/2026/06/14/parsing-json-at-compile-time-with-c26-static-reflection/
1•chmaynard•1m ago•0 comments

Hill charts with MCP server and give visibility

https://hillch.art/en
1•Jeronattend•2m ago•0 comments

Amazon says its datacenters used about 2.5B gallons of water last year

https://www.theregister.com/on-prem/2026/06/12/amazon-owns-up-to-using-25bn-gallons-of-h2o-in-its...
1•tcp_handshaker•3m ago•0 comments

Hands-On with Flink: Calling LLMs from Flink

https://medium.com/@katyagorshkova/hands-on-with-flink-part-6-calling-llms-from-flink-e5cc7e5f0440
1•tanelpoder•4m ago•0 comments

Ponytail – make your AI agent think like the laziest senior dev in the room

https://github.com/DietrichGebert/ponytail
2•mellosouls•5m ago•0 comments

SpaceX Forecasted to Burn $350B by 2030

https://www.youtube.com/watch?v=N5jnH9eH_Vg
1•tcp_handshaker•7m ago•0 comments

Elon Musk drifted from Larry Page 10+yrs ago, companies now closer than ever

https://www.cnbc.com/2026/06/14/elon-musk-drifted-from-larry-page-but-spacex-google-closer-than-e...
1•1vuio0pswjnm7•8m ago•0 comments

Splunk Enterprise Vulnerabilities Allow Unauthenticated File Operations

https://orca.security/resources/blog/cve-2026-20253-splunk-enterprise-rce-unauthenticated-file-op...
1•hliyan•10m ago•0 comments

N-Tier Services and Systems Complexity

https://yegge.ai/listings/services-and-complexity
1•bobbiechen•10m ago•0 comments

How much of Elon Musk's wealth comes from government help? Virtually all of it

https://www.rnz.co.nz/news/world/598157/how-much-of-elon-musk-s-wealth-comes-from-government-help...
6•totetsu•12m ago•3 comments

Where Wizards Stay Up Late – A Book Review (2024)

https://www.neilobrien.co.uk/p/where-wizards-stay-up-late
2•initramfs•13m ago•0 comments

Story of human evolution rewritten after 1.8M-year-old cave discovery

https://www.dailymail.com/sciencetech/article-15886169/human-evolution-fire-wonderwerk-cave-disco...
1•Bender•15m ago•0 comments

Starmer to announce social media curfew and chatbot ban for teenagers

https://www.thetimes.com/uk/politics/article/social-media-ban-keir-starmer-qcmskxc5z
1•poisonfountain•16m ago•0 comments

Perlisisms

https://www.cs.yale.edu/homes/perlis-alan/quotes.html
3•tosh•16m ago•1 comments

Cloud-based LLM gold rush is ending

https://automato.substack.com/p/apple-wwdc-and-the-fable-5-embargo
6•andrewstetsenko•17m ago•0 comments

Podcast: Book Interview: Signals and Levers • Elisabeth Hendrickson, Joel Tosi [video]

https://www.youtube.com/watch?v=8tNtZMm3Hyc&list=PLEx5khR4g7PJbSLmADahf0LOpTLifiCra
1•chhum•19m ago•0 comments

Moats Need Models

https://twitter.com/sahar__zadeh/status/2064759511253176398
1•gmays•20m ago•0 comments

I built InstaTakker – a portable desktop Instagram workflow manager for Windows

https://github.com/issaghostlife/instatakker-app
1•issaghostlife•21m ago•1 comments

UK set to announce social media ban for under-16s

https://www.manchestereveningnews.co.uk/news/uk-news/uk-set-announce-social-media-34119132
45•beejiu•22m ago•28 comments

Ask HN: Is Coding Solved?

1•champagnepapi•23m ago•3 comments

Signal says UK plan to scan devices for nude images 'endangers us all'

https://www.theregister.com/security/2026/06/09/signal-uks-child-nude-block-threat-wont-protect-c...
5•Bender•23m ago•0 comments

Show HN: Öcha – A minimalist, Kindle-style RSS and newsletter reader

https://readocha.com/
2•pavn•23m ago•0 comments

US Army picks out Vampire to fill a gap in its layered drone defenses

https://www.theregister.com/offbeat/2026/06/14/us-army-picks-out-vampire-to-fill-a-gap-in-its-lay...
1•Bender•23m ago•0 comments

Dangerous hormone-disrupting chemicals found in US breast milk samples

https://www.theguardian.com/us-news/2026/jun/14/breast-milk-research-chemicals
10•andsoitis•26m ago•0 comments

No, everyone is not using AI for everything

https://gabrielweinberg.com/p/people-are-consuming-ai-like-they
2•yegg•29m ago•0 comments

Cloud-9 AWS spot instance optimizer with ML price prediction and FinOps advisors

https://cloud-9-optimizer.streamlit.app
2•Medhane•30m ago•0 comments

A 'cold blob' in the Atlantic could be a sign of AMOC shutdown – CNN

https://www.cnn.com/2026/06/12/climate/cold-blob-atlantic-amoc-ocean-circulation
29•tambourine_man•33m ago•4 comments

The Typestate Pattern in Rust

https://cliffle.com/blog/rust-typestate/
2•Brajeshwar•33m ago•0 comments