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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/

Nowmine

https://signal.nowmine.site/
1•tjjune•23s ago•0 comments

Ask HN: Why have we normalized jobs and soft skills bullshit so much?

1•thomasjeff1•32s ago•0 comments

The Scourge of x86 Emulation

https://fex-emu.com/Scourge-of-emulation/
1•dagmx•3m ago•0 comments

Ngrx Inspector

https://marketplace.visualstudio.com/items?itemName=fredyang.ngrx-inspector
1•freddy18•5m ago•0 comments

Reflections on Trusting Trust, Revisited: Poisoning Self-Modifying AI Coding

https://arxiv.org/abs/2609.17817
1•sbulaev•6m ago•0 comments

Hacker

1•jurryythg•9m ago•2 comments

Anderon (IBM) finalizes $1B CHIPS award for US quantum foundry R&D

https://newsroom.ibm.com/2026-09-16-anderon,-an-ibm-company,-finalizes-agreement-with-the-u-s-dep...
1•osnium123•10m ago•0 comments

A Bitter Lesson for Data Filtering

https://arxiv.org/abs/2605.19407
1•nujan_dev•11m ago•1 comments

Mojo 1.1: the compiler now accepts contributions

https://www.modular.com/blog/modular-26-6-open-compiler-contributions-audio-generation-and-expand...
1•user142•12m ago•0 comments

Show HN: Continuity – project state your AI sessions can't silently contradict

https://github.com/vikcena01/ai-continuity-plugin
1•vikcena01•16m ago•0 comments

Show HN: Free Tournament Bracket Maker and Generator

https://snapbracket.com/
1•littlelight•17m ago•0 comments

macOS 27 is a lifesaver for killing leftover AI Agent processes

https://9to5mac.com/2026/06/09/macos-27-golden-gate-makes-it-clear-when-apps-are-sneakily-running...
2•pierreneter•17m ago•2 comments

The Provenance Tax: How LLM Watermarking Changes AI Agent Behavior

https://www.lasso.security/blog/the-provenance-tax-understanding-the-impact-of-llm-watermarking-o...
2•fourfire•19m ago•0 comments

Waymo in Singapore

https://waymo.com/waymo-in-singapore/
3•ramanan•24m ago•1 comments

The Concerns Surrounding Rapid Rise of AI and What We Should Do About It

https://medium.com/@f9121212/this-article-addresses-the-concerns-surrounding-the-rapid-rise-of-ai...
1•ortrich•25m ago•0 comments

Age of Beyond [video]

https://www.youtube.com/watch?v=vp7xoPeWzEw
1•suopspaces•27m ago•0 comments

Natural General Intelligence

https://naturalgeneralintelligence.ai/
2•jbegley•32m ago•0 comments

Youper is shutting down – What kills mental health AI?

https://www.youper.ai/notice
2•batman2019•50m ago•0 comments

Show HN: Free GitHub Action that scans PR diffs for malicious code, not quality

https://github.com/marketplace/actions/vigil-pr-scanner
2•arsalsajjad•52m ago•0 comments

The Bitterest Lesson

https://typesafe.ai/blog/bitterest-lesson
2•emersonmacro•57m ago•0 comments

Google announces new experimental "CC" AI agent for families

https://arstechnica.com/google/2026/09/google-announces-new-experimental-cc-ai-agent-for-families/
2•geoffbp•58m ago•0 comments

Show HN: Green Screen Remover – free in-browser chroma key, nothing uploaded

https://greenscreenremover.net/
2•wangqing333•1h ago•0 comments

I built the fastest PHP webserver in the world

https://qbixserver.com
2•EGreg•1h ago•0 comments

Data

2•justavalidman•1h ago•0 comments

Running OpenBAO on Kubernetes with a CloudNativePG PostgreSQL Back End

https://www.cncf.io/blog/2026/09/16/running-openbao-on-kubernetes-with-a-cloudnativepg-postgresql...
2•geoffbp•1h ago•0 comments

Show HN: Concat: the open-source CapCut replacement.

https://github.com/jub0t/Concat
2•calanus•1h ago•0 comments

Pre-Greek: The lost language hidden within Ancient Greek

https://linguisticdiscovery.com/posts/pre-greek/
5•axiologist•1h ago•0 comments

Code Scans

https://devin.ai/blog/introducing-code-scans
6•geoffbp•1h ago•0 comments

Warez: The Infrastructure and Aesthetics of Piracy Culture

https://archive.org/details/b904a8eb-9c98-4bb1-bf25-3cb9d075b157
5•succinct_ideas•1h ago•0 comments

Show HN: Jinx – a link shortener you host free on GitHub Pages

https://jinx.fyi
2•SubmersibleZoom•1h ago•0 comments