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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: Piggzy – Turn your inbox into a universal 'Buy' button

https://www.piggzy.com
1•contactreddyk•15s ago•0 comments

Americans are unleashing their anger on food-delivery robots

https://www.economist.com/united-states/2026/02/16/americans-are-unleashing-their-anger-on-food-d...
1•andsoitis•1m ago•0 comments

Manus AI launched 24/7 Agent via Telegram and got suspended

https://www.testingcatalog.com/manus-ai-launched-24-7-agent-via-telegram-and-got-suspended/
1•gmays•2m ago•0 comments

Google is killing authentic websites and I made it worse [video]

https://www.youtube.com/watch?v=II2QF9JwtLc
1•dataflow•6m ago•0 comments

XSDR, a single-sided M.2 software-defined radio with 2×RX/TX up to 3.8 GHz

https://www.crowdsupply.com/wavelet-lab/xsdr
2•iamnothere•8m ago•0 comments

Show HN: Stop Losing LangGraph Progress to 429 Errors

https://www.ezthrottle.network/blog/stop-losing-langgraph-progress
1•rjpruitt16•9m ago•0 comments

Show HN: Purely Vibe Coded Asmongold Simulator

https://spirofloropoulos.com/asmongold_simulator/
1•spirodonfl•19m ago•0 comments

The Consequences of the Epstein Document Release Start to Pile Up

https://www.nationalreview.com/the-morning-jolt/the-consequences-of-the-epstein-document-release-...
6•petethomas•19m ago•1 comments

Major PC OEMs Reportedly Exploring Chinese CXMT Memory Amid Shortages

https://www.techpowerup.com/346035/major-pc-oems-reportedly-exploring-chinese-cxmt-memory-amid-sh...
3•walterbell•20m ago•0 comments

Agent-evals: Overlap, boundary, and metacognitive scoring for coding agents

https://thinkwright.ai/agent-evals
1•oceanwaves•21m ago•1 comments

Why Affordability and the Vibecession Are Real Economic Problems

https://newsletter.mikekonczal.com/p/why-affordability-and-the-vibecession
2•NomNew•22m ago•0 comments

Hard Drive Prices Unexpectedly Rise in 2026

https://gettingwin.com/industry-information/592.html
2•AndrejXY•22m ago•0 comments

Manage Your Dotfiles with Stow

https://www.gnu.org/software/stow/manual/stow.html
1•ddtaylor•26m ago•0 comments

Show HN: The first financial intelligence MCP server live trading signals Claude

https://web-production-71423.up.railway.app/mcp-server
1•Shmungus•31m ago•0 comments

Show HN: Forage – MCP server that lets AI agents find and install their own MCPs

https://github.com/isaac-levine/forage
1•DoomedWheel1027•32m ago•1 comments

AI as Exoskeleton

https://clabs.org/blog/AiAsExoskeleton
2•the_chrismo•35m ago•1 comments

A.I. Salaries Are Causing Couples to Rethink Money in Relationships

https://www.nytimes.com/2026/02/14/business/artificial-intelligence-relationships-income-gap.html
2•mooreds•39m ago•1 comments

Sub-second volumetric 3D printing by synthesis of holographic light fields

https://www.nature.com/articles/s41586-026-10114-5
2•westurner•41m ago•0 comments

EU bans AI use on government work devices

https://www.neowin.net/news/eu-parliament-bans-ai-use-on-government-work-devices/
3•bundie•42m ago•1 comments

Filkoll – The fastest command-not-found handler (2025)

https://vorpal.se/posts/2025/mar/25/filkoll-the-fastest-command-not-found-handler/
1•crispinh•44m ago•0 comments

The Death of Traditional Testing

https://engineering.fb.com/2026/02/11/developer-tools/the-death-of-traditional-testing-agentic-de...
1•manveerc•47m ago•0 comments

Apple Begins Testing End-to-End Encryption for RCS Messages in iOS 26.4 Beta

https://www.macrumors.com/2026/02/16/ios-26-4-rcs-encryption-testing/
6•contact9879•47m ago•0 comments

Meta is wrong to try to sneak into facial recognition with Ray-Ban glasses

https://www.bloomberg.com/opinion/articles/2026-02-16/meta-is-wrong-to-try-to-sneak-into-facial-r...
3•socialcommenter•49m ago•4 comments

Access public data insights faster: Data Commons MCP is now hosted on GCloud

https://developers.googleblog.com/access-public-data-insights-faster-data-commons-mcp-is-now-host...
2•manveerc•51m ago•1 comments

I built a tool for software developers

https://techstack.sh/
2•harrypotterwish•53m ago•1 comments

Frederick Wiseman, 96, Penetrating Documentarian of Institutions, Dies

https://www.nytimes.com/2026/02/16/movies/frederick-wiseman-dead.html
2•mhb•56m ago•0 comments

Poor Deming never stood a chance

https://surfingcomplexity.blog/2026/02/16/poor-deming-never-stood-a-chance/
3•todsacerdoti•57m ago•0 comments

Introducing Package Chaos Monkey

https://nesbitt.io/2026/01/26/introducing-package-chaos-monkey.html
2•pabs3•1h ago•0 comments

Facing a demographic catastrophe, Ukraine is paying for troops to freeze sperm

https://www.bbc.com/news/articles/cqxd9549y4xo
29•tartoran•1h ago•10 comments

Fixapl

https://fixapl.netlify.app/
1•todsacerdoti•1h ago•0 comments