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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•9mo ago

Comments

trane_project•9mo 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/

FlowSpeech – Context-Aware Text-to-Speech for Reading Long Documents

https://flowspeech.io/
1•hermanyin•1m ago•1 comments

Dreamer – why we built it

https://blog.singleton.io/posts/2026-02-17-introducing-dreamer/
1•enos_feedler•3m ago•0 comments

Dreamer is a place to discover, build, and enjoy agentic apps

https://dreamer.com/
1•enos_feedler•3m ago•0 comments

Show HN: Claw Diary – Show HN: Visualize what your AI agent does every day

https://github.com/0xbeekeeper/claw-diary
1•agentguard•5m ago•0 comments

Claude.md isn't always read and followed

2•pajtai•7m ago•0 comments

Minecraft Switching from OpenGL to Vulkan

https://www.minecraft.net/en-us/article/another-step-towards-vibrant-visuals-for-java-edition
2•systematizeD•8m ago•0 comments

Show HN: An asset management platform built with Kotlin, Ktor, and libvips

https://github.com/dmaiken/konifer
1•dmaiken•14m ago•0 comments

Show HN: Ottr – one-click human approval links for scripts, CI, and AI agents

https://ottr.run
2•ed1ted•14m ago•0 comments

Step 3.5 Flash: Fast Enough to Think. Reliable Enough to Act

https://static.stepfun.com/blog/step-3.5-flash/
2•kristianp•19m ago•1 comments

The political effects of X's feed algorithm

https://www.nature.com/articles/s41586-026-10098-2
2•Anon84•23m ago•1 comments

Kubernetes Volume Troubleshooting

https://randomwrites.com/architecture/04-Controllers.html
1•mutahirs•24m ago•0 comments

Show HN: Napkin – desktop app for quick diagrams, with MCP support

https://github.com/ipcrm/napkin
2•ipcrm•25m ago•0 comments

Adding Messaging to My Blog Was My Best Idea

https://moddedbear.com/adding-messaging-to-my-blog-was-my-best-idea-ever/
1•CqtGLRGcukpy•28m ago•0 comments

Show HN: Extra-steps.dev – AI hype mapped to CS primitives

https://extra-steps.dev
1•funemployed•33m ago•2 comments

OpenForgeAI – Production agentic architecture I used to build a SaaS alone

1•openforgeai•36m ago•0 comments

You are wasting your non-US traffic

https://www.evendeals.com
2•devarifhossain•38m ago•1 comments

MariaDB innovation: binlog_storage_engine, small server, Insert Benchmark

http://smalldatum.blogspot.com/2026/02/mariadb-innovation-binlogstorageengine_17.html
1•gslin•38m ago•0 comments

Show HN: Pre-AI – Chrome extension that filters AI posts from LinkedIn

https://pre-ai.netlify.app
2•isaacirvin•39m ago•3 comments

Nacdl Criminal Case Tracker

https://www.nacdl.org/Landing/CaseTracker
1•rawgabbit•42m ago•0 comments

Show HN: SignalResume, ATS-first resume builder with grounded AI, free

1•fredfilm•44m ago•0 comments

Who Is Nick Land?

https://www.tabletmag.com/sections/arts-letters/articles/who-is-nick-land
2•Anon84•44m ago•0 comments

Show HN: Pinggy – a fun app to share what you're doing in just one word

https://pinggy.com
2•vasanthv•55m ago•0 comments

Minecraft Java is switching from OpenGL to Vulkan

https://www.gamingonlinux.com/2026/02/minecraft-java-is-switching-from-opengl-to-vulkan-for-the-v...
45•tuananh•56m ago•12 comments

AI pioneer Fei-Fei Li's World Labs raises $1B in funding

https://finance.yahoo.com/news/ai-pioneer-fei-fei-lis-202957884.html
2•Anon84•57m ago•0 comments

Nearly half of L.A. County's pavement may be unnecessary, new map finds

https://www.latimes.com/environment/story/2026-02-16/nearly-half-of-l-a-countys-pavement-may-be-u...
5•littlexsparkee•58m ago•1 comments

Grandpa Lissajous – A 13-Agent AI Orchestration Loop

https://blog.sauhsoj.wtf/posts/the-grandpa-loop/
2•sauhsoj•1h ago•0 comments

Ask HN: Anyone else tired of working in tech?

4•boredemployee•1h ago•2 comments

Golden Age of Web Design

https://www.webdesignmuseum.org/golden-age-of-web-design
1•Nition•1h ago•0 comments

15 years of FP64 segmentation, and why the Blackwell Ultra breaks the pattern

https://nicolasdickenmann.com/blog/the-great-fp64-divide.html
6•fp64enjoyer•1h ago•0 comments

The quirky geology behind Olympic curling stones

https://www.scientificamerican.com/article/the-quirky-geology-behind-olympic-curling-stones/
1•petethomas•1h ago•0 comments