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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•6mo ago

Comments

trane_project•6mo 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/

Philips agrees to acquire SpectraWAVE Inc

https://www.philips.com/a-w/about/news/archive/standard/news/press/2025/philips-agrees-to-acquire...
1•methuselah_in•2m ago•0 comments

Sol – Audio Livestreaming Hardware

https://evenings.fm/sol
1•NickySlicks•2m ago•0 comments

Oceanic Pole of Inaccessibility

https://en.wikipedia.org/wiki/Pole_of_inaccessibility
1•lippihom•4m ago•1 comments

Think Different: Asahi Linux on an M2 MacBook Pro

https://www.feoh.org/posts/think-different-asahi-linux-on-an-m2-macbook-pro.html
1•abnercoimbre•5m ago•0 comments

OWASP PTK 9.2.4: CVE Lookup module and CVE-focused DAST attacks

1•DenisPodgurskii•5m ago•0 comments

The high-end desktop supercomputers for AI and HPC

https://gptshop.ai/
1•doener•5m ago•0 comments

Mister Mxyzptlk

https://en.wikipedia.org/wiki/Mister_Mxyzptlk
1•rolph•5m ago•0 comments

Antigravity prompt injection: Read browser local storage remotely

https://introvertmac.wordpress.com/2025/12/15/ai-ide-prompt-injection-reading-browser-local-storage/
2•introvertmac•7m ago•0 comments

Detailed balance in large language model-driven agents

https://arxiv.org/abs/2512.10047
1•gmays•8m ago•0 comments

Multiple Threat Actors Exploit React2Shell (CVE-2025-55182)

https://cloud.google.com/blog/topics/threat-intelligence/threat-actors-exploit-react2shell-cve-20...
1•gnabgib•8m ago•0 comments

Dictionary of Canadianisms on Historical Principles 3rd Edition

https://dchp.arts.ubc.ca/
1•cf100clunk•9m ago•1 comments

The appropriate amount of effort is zero

https://expandingawareness.org/blog/the-appropriate-amount-of-effort-is-zero/
2•gmays•10m ago•0 comments

Be a Problem-Solver Not a Politician

https://mo42.bearblog.dev/be-a-problem-solver-not-a-politician/
1•speckx•10m ago•0 comments

How iMessage sends and receives messages securely

https://support.apple.com/guide/security/how-imessage-sends-and-receives-messages-sec70e68c949/web
1•CharlesW•10m ago•0 comments

Show HN: Built a tool to allow chatting with SEC filings

https://github.com/ralliesai/tenk
1•rallies•10m ago•0 comments

Show HN: Enabling Agentic Commerce Protocol (ACP) for Shopify Stores

https://www.actory.ai/
1•afrederico•12m ago•1 comments

Fortescue Infinity Train 14.5 MWh battery that never needs charging [update]

https://electrek.co/2025/12/15/fortescue-infinity-train-electric-locomotive-never-needs-fuel-or-c...
2•Bender•12m ago•0 comments

China, Iran are having a field day with React2Shell, Google warns

https://www.theregister.com/2025/12/15/react2shell_flaw_china_iran/
1•Bender•12m ago•0 comments

What's behind the battle between The Mission District and SF tech companies

https://www.sfchronicle.com/bayarea/article/doordash-delivery-drone-21239843.php
1•mikhael•13m ago•0 comments

Ask HN: Bloggers, how do you manage your content?

1•freemanjiang•14m ago•1 comments

Show HN: Build ML training datasets from large-scale satellite/aerial imagery

https://github.com/noahgolmant/label-tiles
1•noahgolmant•15m ago•0 comments

A visual editor for the Cursor Browser

https://cursor.com/blog/browser-visual-editor
1•evo_9•15m ago•0 comments

Improving Emacs Screenshots

https://mbork.pl/2025-12-15_Improving_Emacs_screenshots
1•speckx•17m ago•0 comments

Surveyi – RTXI Real Time Experience Intelligence

https://surveyi.app/
1•dickiedogbrands•17m ago•1 comments

Show HN: I made an LLM-powered CRO tool

https://crovise.netlify.app/
1•adamoufkir•18m ago•1 comments

Google discontinuing their dark web report

https://support.google.com/websearch/answer/16767242?hl=en&co=GENIE.Platform%3DAndroid
12•ortusdux•20m ago•1 comments

What changes when agent routing is fully deterministic?

1•balachandarmani•21m ago•0 comments

Origins of the TPC and the first 10 years

https://www.tpc.org/information/about/history5.asp
1•b-man•21m ago•0 comments

context—Odin’s Most Misunderstood Feature

https://www.gingerbill.org/article/2025/12/15/odins-most-misunderstood-feature-context/
1•davikr•23m ago•0 comments

Ukraine hits Russian submarine with underwater drones

https://www.euronews.com/2025/12/15/ukraine-hit-russian-submarine-with-underwater-drones-for-the-...
5•vinnyglennon•24m ago•0 comments