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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•11mo ago

Comments

trane_project•11mo 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/

Cherry Kearton: The eccentric influence on a young Sir David Attenborough

https://www.bbc.com/future/article/20260507-cherry-kearton-the-eccentric-influence-on-a-young-sir...
1•saikatsg•2m ago•0 comments

Hardware Attestation as Monopoly Enabler

https://grapheneos.social/@GrapheneOS/116550899908879585
2•ChuckMcM•5m ago•1 comments

Null ID – A local daemon for age restrictions without surveillance

https://github.com/ni-initiative/ni-initiative
1•jockeF•6m ago•0 comments

Show HN: Lune - Software for agents that do serious science

https://luneresearch.com
1•ttttonyhe•8m ago•0 comments

Apple to Make Design Changes in macOS 27 to Address Tahoe Quirks

https://www.bloomberg.com/news/newsletters/2026-05-10/apple-plans-macos-27-design-changes-latest-...
1•mfiguiere•11m ago•0 comments

Show HN: Visual Learning with LLMs

https://forray.io/
1•aab99•12m ago•0 comments

Incident CVE-2024-Yikes

https://nesbitt.io/2026/02/03/incident-report-cve-2024-yikes.html
1•miniBill•15m ago•0 comments

'10 minutes of nirvana': 52 writers on the best sandwich of their life

https://www.theguardian.com/food/2026/may/10/52-writers-on-the-best-sandwich-of-their-life
2•laurex•22m ago•0 comments

Ask HN: What Are You Working On? (May 2026)

2•david927•24m ago•5 comments

Scientists Studied 906 Mafia Marriages and Found Something Surprising

https://www.404media.co/scientists-studied-906-mafia-marriages-and-found-something-surprising/
2•Brajeshwar•25m ago•0 comments

The Mayor Method

https://github.com/day8/re-frame2/blob/main/docs/the-mayor-method.md
1•yurivish•25m ago•0 comments

Familiar Machines and Magic introduces adorable smart robot assistants

https://www.familiarmachines.com/
1•robotlaunch•25m ago•0 comments

Dark Star (Film, 1974)

https://en.wikipedia.org/wiki/Dark_Star_(film)
4•maxall4•25m ago•0 comments

'AI gave me your number': AI doxxing turns ChatGPT hallucinations to harassment

https://www.the-independent.com/tech/ai-doxxing-gemini-hallucination-google-b2973008.html
2•ColinWright•27m ago•1 comments

I built a local portal so ChatGPT (Pro models) can browse my accounts safely

https://github.com/DenisSergeevitch/chatgpt-portal
1•neuraldenis•31m ago•0 comments

The Mindset Shift That Unlocked Y Combinator for Me

https://nmn.gl/blog/meditations-on-make-something-people-want
1•namanyayg•34m ago•0 comments

Mostly the first breakup AI agent that delivers your breakup over iMessage

https://behalf.love
1•goyibo•35m ago•0 comments

Study: Egg consumption is associated with a lower risk of Alzheimer's Disease

https://news.llu.edu/research/study-egg-consumption-associated-lower-risk-alzheimers-disease
3•bilsbie•36m ago•0 comments

The Atari 800 – By Paul Lefebvre

https://www.goto10retro.com/p/inside-the-atari-800
1•rbanffy•36m ago•1 comments

My writing students were using AI. Their confessions led to a teaching moment

https://www.theguardian.com/us-news/ng-interactive/2026/may/10/fiction-writing-professor-ai
5•spzb•39m ago•1 comments

Utah's 'hyperscale' data center could create heat island near Great Salt Lake

https://www.sltrib.com/news/environment/2026/05/07/utahs-data-center-could-create/
2•NDlurker•39m ago•1 comments

Local AI needs to be the norm

https://unix.foo/posts/local-ai-needs-to-be-norm/
4•cylo•39m ago•1 comments

Integrating no-as-a-service in Linux kernel code

https://github.com/hotheadhacker/no-as-a-service/commit/e6b4218394f3ab6c513caaf2ec2e3e88d03d124c
2•testdelacc1•42m ago•0 comments

Suprnova Reboot

https://ir3-w-a63739.gitlab.io/
1•machardmachard•43m ago•1 comments

Big Tech is moving data out of the Gulf through Iraqi oil pipelines

https://restofworld.org/2026/iraq-big-tech-gulf-war-data/
2•JumpCrisscross•43m ago•0 comments

Tracesofhumanity.org by Joanna Rutkowska

https://tracesofhumanity.org/hello-world/
14•alex77456•43m ago•2 comments

Wayland.fyi minimalist Wayland special interest group

https://wayland.fyi/
1•0l•47m ago•0 comments

Show HN: PerceptAI – Give AI agents eyes on any screen, not just browsers

1•Neerajj04•49m ago•0 comments

A decade of flying Spirit Airlines

https://jackfromgetcho.substack.com/p/farewell-and-thank-you-spirit
2•jackconsidine•49m ago•0 comments

Training an LLM in Swift, Part 1: Taking matrix mult from Gflop/s to Tflop/s

https://www.cocoawithlove.com/blog/matrix-multiplications-swift.html
2•zdw•54m ago•0 comments