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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/

Show HN: HereTool – A fast, client-side web utility suite with zero data logging

https://heretool.com/
1•heretool•1m ago•0 comments

AWS Interconnect – Multicloud Connectivity with Oracle Cloud Infrastructure

https://aws.amazon.com/about-aws/whats-new/2026/07/aws-announces-AWS-interconnect-multicloud-OCI-GA/
1•gslin•3m ago•0 comments

Fluent – Voice computer use agent for Windows (VLM and accessibility tree)

https://fluentforall.com/
1•jasonmatthews•4m ago•1 comments

Modern-Apps: Ecosystem of open source apps written using modern technologies

https://github.com/vayun-mathur/Modern-Apps
1•nalinidash•4m ago•1 comments

Coinkite warns Coldcard hardware wallet users of firmware flaw

https://cryptobriefing.com/coinkite-coldcard-mk3-firmware-rng-security-warning/
1•ParentiSoundSys•13m ago•0 comments

Migrants swim from Morocco to Spanish enclave of Ceuta

https://www.bbc.com/news/articles/cg4drwzkrkxo
2•FridayoLeary•18m ago•2 comments

Swift on Windows: A Year of Refinement

https://speakinginswift.substack.com/p/swift-on-windows-a-year-of-refinement
1•timsneath•19m ago•0 comments

What is mixotrophy, and why does it matter?

https://dantheclamman.blog/2026/03/16/what-is-mixotrophy-and-why-does-it-matter/
1•BigTTYGothGF•19m ago•0 comments

Today's Market = 1999 Capex and 2008 Credit

https://investor.fm/todays-market-1999-capex-2008-credit/
1•mapping365•21m ago•0 comments

Vale CLI: Linter for Prose

https://github.com/vale-cli/vale
1•joeyhage•22m ago•0 comments

Amazon finds cases of AI causing runaway spending on tech projects

https://www.ft.com/content/77baac40-d803-4084-94f3-a133653072cf
1•i2km•24m ago•2 comments

Ejabberd 26.07 / ProcessOne – Erlang Jabber/XMPP/Matrix Server – Communication

https://www.process-one.net/blog/ejabberd-26-07/
2•neustradamus•25m ago•0 comments

Exploring the "Dario and Amanda" Prompt

https://alec.is/posts/exploring-the-dario-and-amanda-prompt/
3•arm32•25m ago•0 comments

TaskLoco Swears Sticky Notes on a Storyboard App Is the Secret

https://www.taskloco.com/
1•taskloco_nyc•25m ago•1 comments

Show HN: ResiliReplay - Chaos testing for AI agents and MCP servers

https://github.com/aliengineering-byte/resilireplay
1•ali110v•26m ago•0 comments

Anthropic says its own AI models breached three companies during security tests

https://techcrunch.com/2026/07/30/anthropic-says-its-own-ai-models-breached-three-companies-durin...
2•GavinAnderegg•30m ago•1 comments

Ask HN: After 8 Years of Failed Apps, Should I Give Up?

2•asoomi07•31m ago•1 comments

Ceuta, an autonomous city of Spain in North Africa

https://en.wikipedia.org/wiki/Ceuta
2•kaonwarb•31m ago•0 comments

Uninsured Patients Rise Sharply, Hospitals Report, Citing Obamacare Cuts

https://www.nytimes.com/2026/07/30/business/aca-obamacare-health-insurance.html
1•elo2000•33m ago•0 comments

Top 1% of U.S. nonprofits account for 75% of revenue

https://data.charitysense.com/blog/the-4-trillion-blind-spot
3•mtweak•37m ago•1 comments

Tesla Weighs Sale of China Business to Pave Way for Potential SpaceX Merger

https://www.wsj.com/business/autos/tesla-weighs-sale-of-china-business-to-pave-way-for-potential-...
5•JumpCrisscross•40m ago•0 comments

Anthropic finds that its models also compromised external systems during testing

https://www.axios.com/2026/07/30/anthropic-mythos-security-testing
3•nevir•42m ago•2 comments

Anthropic's AI models hacked 3 organizations during testing

https://www.politico.com/news/2026/07/30/anthropic-ai-rogue-hacks-01018741
2•tejohnso•46m ago•1 comments

Show HN: Widen – Open-source Mac Postgres GUI with local or cloud text-to-SQL

https://widen.dev/
5•thedreammachine•49m ago•0 comments

Canada celebrates new bridge to US while fighting Trump tariffs

https://apnews.com/article/canada-detroit-new-bridge-4b22dc7fc282467a363a247fe590f334
2•gmays•49m ago•0 comments

'The Boss Wants This Money': Inside Trump's Unprecedented Fundraising Operation

https://www.wsj.com/politics/policy/trump-donations-company-fundraising-1e34a78f
4•petethomas•51m ago•0 comments

Showdown Elo: weighted Elo for baseball

https://showdown.tanji.systems/#almanac
2•merriman-xyz•53m ago•0 comments

OpenAI's Hack of Hugging Face

https://www.newyorker.com/news/the-lede/inside-openai-hack-of-hugging-face
2•bwoah•54m ago•1 comments

Show HN: Stash – native Mac Markdown notes

https://staunchapps.com/stash/
3•andrewjk•59m ago•0 comments

Uefa agrees to boycott FIFA competitions if World Cup sell-off plans proceed

https://www.theguardian.com/football/2026/jul/30/uefa-agrees-to-boycott-fifa-competitions-if-worl...
1•rguiscard•1h ago•1 comments