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Bloom's two sigma problem (2020)

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

Comments

trane_project•8mo 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/

One Killed in train derailment near Barcelona days after deadly rail collision

https://bnonews.com/index.php/2026/01/1-killed-in-train-derailment-near-barcelona-days-after-dead...
1•bob1029•1m ago•0 comments

Show HN: Date Clue – magazine quiz style dating quiz with AI insights

https://dateclue.com/
1•renbuilds•2m ago•0 comments

Plastic Waste to Pharmaceuticas: Upcycling Through Ruthenium Semi-Hydrogenation

https://onlinelibrary.wiley.com/doi/10.1002/anie.202521838
1•PaulHoule•2m ago•0 comments

Ask HN: What have you built/shipped with Claude-code

1•blhack•3m ago•0 comments

Digital Omnibus Report V2: Analysis of Select GDPR and EPrivacy Proposals by EC

https://noyb.eu/en/digital-omnibus-report-v2-analysis-select-gdpr-and-eprivacy-proposals-commission
1•buzer•4m ago•0 comments

Penn Calls Government's Demand for Lists of Jewish Staff 'Disconcerting'

https://www.nytimes.com/2026/01/20/us/university-of-pennsylvania-trump-jewish-staff.html
1•duxup•4m ago•1 comments

macOS Stats: Local Privilege Escalation via Exposed XPC Method

https://github.com/exelban/stats/security/advisories/GHSA-qwhf-px96-7f6v
1•inatreecrown2•4m ago•0 comments

Zero to One: Learning Agents and Agentic Patterns

https://pradyumnachippigiri.dev/blogs/understanding-ai-agents
1•PraddyChippzz•5m ago•1 comments

In a warming world, freshwater production is moving deep beneath the sea

https://apnews.com/article/climate-solutions-desalination-oceans-drinking-water-faba2579f83df4c06...
1•embedding-shape•6m ago•0 comments

Skyreader: A RSS Reader on the AT Protocol

https://www.disnetdev.com/blog/2026-01-20-skyreader-a-rss-reader-on-the-at-protocol/
2•erlend_sh•6m ago•1 comments

Being creative requires taking risks

https://www.henrikkarlsson.xyz/p/being-creative-requires-taking-risks
1•Curiositry•10m ago•0 comments

Hacker Lists Vibecoded Apps: 198 Scanned, 196 Found Vulnerable

https://firehound.covertlabs.io
3•birdculture•13m ago•0 comments

Spotlight Rules

https://spotlight-rules.com/
1•mooreds•15m ago•0 comments

Claude Chill: Fix Claude Code's Flickering in Terminal

https://github.com/davidbeesley/claude-chill
1•behnamoh•15m ago•0 comments

The Surprising Way AI Models Are Helping Humans Communicate Better

https://www.bbc.com/future/article/20251218-how-ai-can-teach-us-to-really-listen
1•xthe•17m ago•1 comments

How to generate 50K token documents using an agentic scaffold

https://www.dataframer.ai/posts/long-text-generation-dataframer-vs-baseline/
1•alex_aimon•17m ago•0 comments

FastMCP 3.0: From Tool Servers to Context Applications

https://mcpstatus.io/blog/202601-fastmcp-3
2•qave•19m ago•0 comments

Show HN: Free interactive security awareness library

https://ransomleak.com/learning/
1•dkozyatinskiy•21m ago•0 comments

AMD Ryzen AI Halo

https://twitter.com/AMDRyzen/status/2013642938106986713
2•polyrand•21m ago•0 comments

When Buttons Were the Hottest New Thing in Radio

https://paleofuture.com/blog/2024/12/30/when-buttons-were-the-hottest-new-thing-in-radio
1•ohjeez•24m ago•0 comments

Death Is an Engineering Challenge

https://danburonline.substack.com/p/death-is-an-engineering-challenge
1•kvee•27m ago•0 comments

I created an app to fight my sedentarism

https://movedoro.com/
1•gllermaly•29m ago•1 comments

Show HN: Poopyfeed – free, private, no account newborn tracking

https://develop.poopyfeed.com
1•mjmasia•29m ago•0 comments

JustHTML 1.0.0 Released

https://github.com/EmilStenstrom/justhtml
1•EmilStenstrom•33m ago•1 comments

F16 Falcon 2.0 – 3D Flight Simulator on Casio Calculator [video]

https://www.youtube.com/watch?v=cu6AIIK-RDc
1•starkparker•34m ago•0 comments

Anime.js Layout

https://animejs.com/documentation/layout/
2•handfuloflight•35m ago•0 comments

National income per adult has increased 1.1% per year on average 2010-2025

https://bsky.app/profile/gabrielzucman.bsky.social/post/3mcv2eqdb7s2y
2•doener•35m ago•1 comments

Amnesty urges halt to execution of 19-year-old Iranian protester

https://www.iranintl.com/en/202601209686
2•ukblewis•39m ago•0 comments

Ask HN: Have you integrated LLMs into any of your bash scripts or aliases?

1•detectivestory•39m ago•1 comments

Trying to exercise my data privacy rights led me to build a small opt-out tool

https://privacypartnersapp.com/
1•longbread•41m ago•1 comments