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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: Battle Bot Royale – multiplayer web game

https://battle-bot-royale.cloudflare-ryan.workers.dev
1•ryanbuening•2m ago•0 comments

LLMs are real, AI is fake

https://pluralistic.net/2026/09/12/god-in-the-box/
1•danaris•4m ago•0 comments

GameMath

https://github.com/TheAssemblyArmada/GameMath
1•skibz•5m ago•0 comments

Paired with Greptile = No Bugs

https://abloh.dev/
3•LoloENG•9m ago•0 comments

Novgraph: Persistent Knowledge Graph for Codebases

1•Shourya_55•12m ago•0 comments

Kubernetes v1.37: KubeletInUserNamespace (Rootless) to Beta

https://kubernetes.io/blog/2026/09/04/kubernetes-v1-37-rootless-beta/
2•torutofu•13m ago•0 comments

Larry Ellison to sell up to $7.5B worth of Oracle stock

https://www.ft.com/content/25b1abb0-790f-4315-9b0c-530d959a086f
4•potatobox•14m ago•1 comments

Fruit Fly Trades Stocks

https://www.theregister.com/offbeat/2026/09/11/disembodied-fruit-fly-brain-joins-the-crypto-specu...
1•NtG_UK•14m ago•1 comments

Show HN: Java MCP Runtime for virtual threads

https://tachyonmcp.dev
1•lumestro•16m ago•1 comments

Restrictions on Geographic Data in China

https://en.wikipedia.org/wiki/Restrictions_on_geographic_data_in_China
1•radeeyate•17m ago•0 comments

Dwarf Star Support for DeepSeek 4.1 Flash on MBPro 128GB

2•fghorow•17m ago•0 comments

How to Become an Ethical Hacker – HTTP Request Tampering

https://medium.com/@Koukyosyumei/web-security-tutorial-with-h5i-part-1-http-request-tampering-39c...
1•syumei•18m ago•0 comments

Kill All Humans lets you reserve a spot on AIs nice list before it's too late

https://kill-all-humans.ai/
2•VintageData•20m ago•2 comments

Show HN: Duo Studio – Open-source iPhone Duo mockup maker

https://iduo.clothpath.com/
1•huang4fun•21m ago•1 comments

Scientists Create a New Form of Ice at More Than 2k °C

https://www.sciencealert.com/scientists-create-a-new-form-of-ice-at-more-than-2000-c
1•signa11•26m ago•0 comments

Shrink your Go binaries with this one weird trick

https://words.filippo.io/shrink-your-go-binaries-with-this-one-weird-trick/
2•thunderbong•28m ago•0 comments

000

https://www.thethesaurusrex.com/000/
1•yosefjaved1•28m ago•0 comments

Don't build tools for AI agents

https://www.seangoedecke.com/dont-build-tools-for-ai-agents/
1•ingve•31m ago•0 comments

Coding Is Over. Get over It

https://blog.pitermarx.com/2026/09/coding-is-over.-get-over-it./
3•pitermarx•35m ago•1 comments

Political AI Field Guide: Factions and Beliefs

https://kategage.substack.com/p/political-ai-field-guide-factions
1•m-hodges•35m ago•0 comments

Scanning Sweden on a Raspberry Pi

https://lorentz.app/blog-item.html?id=scanning-sweden
2•baalimago•38m ago•0 comments

GVS5H: Five Qwen3.8-27B Models Match Claude Fable 5 on LiveCodeBench Hard

https://github.com/slee-persis/GVS5H
1•OakNinja•40m ago•0 comments

NMS Ceefax

https://nmsceefax.co.uk/#id=WyJubXMtY2VlZmF4IiwiaW50ZXJuYWwubmF0aGFubWVkaWFzZXJ2aWNlcy5jby51ayIsI...
1•Eridanus2•41m ago•0 comments

A Few Good Ideas in Programming Languages

https://prydt.xyz/blog/a-few-good-ideas-in-pl/
1•airhangerf15•43m ago•0 comments

At This French Marathon, Runners Make Pit Stops for Wine and Oysters

https://www.nytimes.com/2026/09/12/well/move/marathon-du-medoc-france-wine.html
2•ceejayoz•44m ago•0 comments

You Are Not an Artisan (2013)

https://ribbonfarm.com/2013/07/10/you-are-not-an-artisan/
1•tolerance•44m ago•0 comments

FPGA: Programming an FPGA with Verilog, Simulation, and Hardware Verification

https://medium.com/@deeptiman/fpga-programming-an-fpga-with-verilog-simulation-and-hardware-verif...
1•Deeptiman•45m ago•0 comments

FPGA: Clocks, Timing, Metastability, and Clock Domain Crossing

https://codingpirate.com/fpga-clocks-timing-metastability-and-clock-domain-crossing-50192478be77
2•Deeptiman•45m ago•0 comments

Show HN: Blender MCP by ArchBench

https://github.com/3d-mcp/blender-mcp
1•eddieweng•46m ago•0 comments

Teen reading slumps to worst this century due to surge in screen time

https://www.reuters.com/world/china/teen-reading-slumps-worst-this-century-due-surge-screen-time-...
2•m-hodges•47m ago•4 comments