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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

I built an interactive simulator to explore AI futures (2025-2030)

https://ai-futures.vercel.app/
1•lout332•32s ago•0 comments

Show HN: Agtrace – top and tail -f for AI coding agent sessions

https://github.com/lanegrid/agtrace
1•zawakin•1m ago•0 comments

Show HN: Word Game's New Home

https://dropspace.app/en
1•taptap4•1m ago•0 comments

Yellow tinted presentations look ugly

1•fainpul•1m ago•0 comments

ParadeDB Makes Faceted Search 14× Faster Inside PostgreSQL

https://www.paradedb.com/blog/faceting
1•jamesgresql•1m ago•0 comments

Show HN: Interactive plan annotation and sharing for Claude Code

https://github.com/backnotprop/plannotator
1•ramoz•1m ago•0 comments

Poor Man's Productivity Trick

https://idiallo.com/blog/poormans-productivity-trick
1•foxfired•3m ago•0 comments

Why women on LinkedIn are masquerading as men

https://nationalpost.com/news/world/women-linkedin-masquerading-as-men
1•andy99•4m ago•1 comments

The Mythical Non-Roboticist (2024)

https://generalrobots.substack.com/p/the-mythical-non-roboticist
1•dan353hehe•5m ago•0 comments

Hacker news static mirror

https://da0a80a4.static-news-dtg.pages.dev/
1•keepamovin•7m ago•0 comments

Wuchale (internationalization from plain code) now supports Astro

https://wuchale.dev/
1•K1DV5•9m ago•0 comments

Potato: A small, data-oriented pansharpener

https://github.com/celoyd/potato
1•Thrymr•9m ago•0 comments

Tilus: A Tile-Level GPGPU Programming Language for Low-Precision Computation

https://dl.acm.org/doi/10.1145/3760250.3762219
1•matt_d•10m ago•0 comments

Teens are having disturbing interactions with chatbots and how to lower the risk

https://www.npr.org/2025/12/29/nx-s1-5646633/teens-ai-chatbot-sex-violence-mental-health
1•toomuchtodo•10m ago•1 comments

Next.js makes many tiny serverless requests for all visible links

https://github.com/vercel/next.js/discussions/24009
1•barishnamazov•11m ago•1 comments

Optimal Software Pipelining and Warp Specialization for Tensor Core GPUs

https://arxiv.org/abs/2512.18134
1•matt_d•12m ago•0 comments

Building low-level software with only agents

https://leerob.com/pixo
1•dvrp•12m ago•0 comments

Ask HN: Are AI agents overloading your back end APIs?

1•Ugyen_Tech•13m ago•0 comments

CVE-2025-63701: My first CVE Heap corruption in POS printer driver

https://neurowinter.com/security/2025/10/08/Heap-Corruption-in-Advantech-TP-3250-Printer-Driver/
2•NeuroWinter•13m ago•0 comments

Let Your Teams Own Their Processes

https://chaoticgood.management/let-your-teams-own-their-processes/
2•a4isms•13m ago•1 comments

Huge binaries: I thunk therefore I am

https://fzakaria.com/2025/12/29/huge-binaries-i-thunk-therefore-i-am
1•ckardaris•13m ago•0 comments

Can Bundler Be as Fast as Uv?

https://tenderlovemaking.com/2025/12/29/can-bundler-be-as-fast-as-uv/
1•todsacerdoti•14m ago•0 comments

Fluster – A futuristic filesystem that's stuck in the past

https://github.com/DocJade/fluster_rs
1•yincrash•15m ago•0 comments

The Origami Men

https://substack.com/inbox/post/175459866
1•TomasBjartur•18m ago•0 comments

The Hydrant Directory

https://www.dayroselane.com/hydrants
1•ohjeez•18m ago•0 comments

Open-source USB to GPIB adapter connects IEEE-488 instruments to modern hosts

https://www.cnx-software.com/2025/12/29/open-source-hardware-usb-to-gpib-adapter-connects-legacy-...
1•jandeboevrie•18m ago•0 comments

Everything That Can Be Deterministic, Should Be: My Claude Code Setup

https://vexjoy.com/posts/everything-that-can-be-deterministic-should-be-my-claude-code-setup/
2•AndyNemmity•19m ago•0 comments

What We're Bringing to Antarctica

https://www.nytimes.com/video/climate/100000010613980/what-were-bringing-to-antarctica.html
1•fleahunter•19m ago•0 comments

Escaping Flatland: Career Advice for CS Undergrads

https://space.ong.ac/escaping-flatland
1•fiiisssh•20m ago•0 comments

Getting SEC filings faster by predicting future filing url

2•jgfriedman1999•21m ago•0 comments