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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/

New research says there are 9 types of procrastinators

https://www.inc.com/bill-murphy-jr/new-research-says-there-are-9-types-of-procrastinators-which-o...
1•EndXA•34s ago•0 comments

Fast 68030 Processor Card: Oliver Achten Is Working on the "Performer PF1230"

https://amiga-news.de/en/news/AN-2026-07-00158-EN.html
1•doener•1m ago•0 comments

Show HN: Social Network – News Based Social Discussion

https://qocial.com/
1•qocialApp•2m ago•0 comments

Has – High Assembler for Motorola 68000 (Amiga)

https://github.com/rozensoftware/highamigaassembler
1•doener•2m ago•0 comments

A stricter TypeScript for a world where AI writes most of the code

https://github.com/chitalian/Typescript-Ultra-Strict
1•MarcoDewey•3m ago•0 comments

I Learned to Stop Worrying and Love the Mask

https://dispatchesfromtheautismwars.substack.com/p/how-i-learned-to-stop-worrying-and
2•barry-cotter•5m ago•0 comments

Show HN: Vice Signalling – A narrative game about infiltrating a secret society

https://store.steampowered.com/app/4836310/Vice_Signalling/
1•pmwkaa•5m ago•0 comments

Ships stranded in Gulf could pose global invasive-species threat, study says

https://www.cbc.ca/lite/story/9.7293025
1•colinprince•5m ago•0 comments

Everyone is so annoying about AI

https://cailinpitt.com/blog/2026/8/01/everyone-is-so-annoying-about-ai
2•classictraffic•6m ago•0 comments

Show HN: Atomadic – Zero-LLM Sub-200us MCP Action Interlock

https://atomadic.tech/
1•Atomadic•8m ago•0 comments

The Coldcard Disaster Gets Worse: The Hack May Have Reached $88.6M

https://medium.com/mountain-movers/the-coldcard-disaster-gets-worse-the-hack-may-have-reached-88-...
2•paulpauper•14m ago•0 comments

Show HN: I added a client-side SQL sanitizer so schema never touches our servers

https://www.querytuner.com/
1•autoshiftops•14m ago•0 comments

Create Embedded Software with Swift

https://www.swift.org/get-started/embedded/
1•frizlab•16m ago•0 comments

Galaxy Research Coldcard hack update: 1,158.81 BTC stolen from 2,673 addresses

https://twitter.com/glxyresearch/status/2083560979128820105
3•paulpauper•16m ago•0 comments

Let Sand Think

https://magzimof.com/let-the-sand-think/
1•shaimagz•17m ago•0 comments

Show HN: MCP Emails – An MCP Server for Gmail and IMAP/SMTP Inboxes

https://github.com/Albretsen/MCPEmails/tree/main/self-host
2•asgeiralbretsen•18m ago•0 comments

Peter Principle

https://en.wikipedia.org/wiki/Peter_principle
2•num42•18m ago•0 comments

Is it time to stop using glue and labels on paper?

https://www.bbc.co.uk/news/articles/c872nj1n4xyo
2•edward•18m ago•0 comments

AI learns language from skewed sources. It could change how humans speak/think

https://www.theguardian.com/commentisfree/2026/apr/14/ai-language-human-speech
1•fzeindl•19m ago•0 comments

Show HN: LLM Tools that I made that I cant live without

1•dleech•20m ago•0 comments

Don't grab any seat on a rocket ship

https://hunterwalk.com/2026/08/02/why-grab-any-seat-on-the-rocketship-is-a-bad-career-strategy-th...
1•andsoitis•21m ago•0 comments

The Debate of Mockist vs. Classicist TDD Is Like OOP vs. FP

https://fagnerbrack.com/the-debate-of-mockist-classicist-tdd-is-like-oop-fp-c9124185f3d2
1•theanonymousone•23m ago•0 comments

Why Gen Z is nostalgic for a world it never knew

https://bigthink.com/mind-behavior/why-gen-z-is-nostalgic-for-a-world-it-never-knew/
5•LordAtlas•27m ago•0 comments

Show HN: NixOS-DGX-Spark – Nix and NixOS on the DGX Spark

https://github.com/graham33/nixos-dgx-spark
9•graham33•28m ago•2 comments

Yahoo Finance rate-limits you harder if you spoof a browser User-Agent

https://github.com/AdityaSBisht/finance-mcp
2•adityabisht2700•30m ago•0 comments

Feedback wanted: Reflex – A low-cost retrieval API for recurring documents

https://aivax.net/blog/reflex-retrieval-built-for-recurring-documents/
1•cypherpotato•30m ago•0 comments

Poles of Inaccessibility in the San Gabriel Mountains

https://notes.secretsauce.net/notes/2015/05/06_poles-of-inaccessibility-in-the-san-gabriel-mounta...
1•dima55•30m ago•0 comments

How fast is C++26's std:hive?

https://lemire.me/blog/2026/08/02/how-fast-is-c26s-stdhive/
2•usdogu•30m ago•0 comments

Pushes to arch AUR are suspendended right now.

https://lists.archlinux.org/archives/list/aur-general@lists.archlinux.org/message/YPJ3FQYJTJXXY3R...
10•EbNar•30m ago•0 comments

Best Office Chairs of 2026– We Tested 70 to Pick Them

https://www.wired.com/gallery/best-office-chairs-button-1/
1•joozio•32m ago•0 comments