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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

April 2026 TLDR Setup for Ollama and Gemma 4 26B on a Mac mini

https://gist.github.com/greenstevester/fc49b4e60a4fef9effc79066c1033ae5
1•greenstevester•43s ago•0 comments

Design Optics with Python

https://www.optiland.org/
2•pppone•10m ago•0 comments

HarfBuzz Slug Support with WebGL

https://harfbuzz.github.io/hb-gpu-demo/
1•mcraiha•10m ago•0 comments

Show HN: Anonymous Chat Channels

https://kraa.io/kraa/trees
1•levmiseri•12m ago•1 comments

Show HN: Stashpin – Pinterest downloader for videos and boards

https://stashpin.com
1•aitooltrek-com•13m ago•0 comments

NHS staff boycott Palantir's data platform over ethical concerns

https://www.ft.com/content/dbb67083-bd1d-46e9-b196-1438d54c5795
3•macleginn•15m ago•0 comments

Show HN: Apfel – The free AI already on your Mac

https://apfel.franzai.com
2•franze•20m ago•2 comments

Catching macOS Stealers in the Wild

https://objective-see.org/blog/blog_0x88.html
1•speckx•22m ago•0 comments

Flow – Focus Deeper, Longer

https://play.google.com/store/apps/details?id=com.get.flow_app&hl=en_US
1•K_A_P•26m ago•0 comments

Gemma 4 makes local AI agents practical

https://firethering.com/gemma-4-local-ai-agents/
3•steveharing1•28m ago•0 comments

AI's fluency in other languages hides a Western worldview that can mislead users

https://theconversation.com/ais-fluency-in-other-languages-hides-a-western-worldview-that-can-mis...
5•1659447091•32m ago•0 comments

Tried to Buy a Pint, Finding a Trojan: My First Malware Analysis

https://blog.michaelrbparker.com/post/17
1•birdculture•33m ago•0 comments

A database of analog cameras that can be 3D printed

https://printed.analogcamera.space/
1•thomasjb•33m ago•0 comments

Artemis II astronaut finds two Outlook instances running on computers

https://www.tomshardware.com/software/microsoft-office/artemis-ii-astronaut-finds-two-outlook-ins...
1•doener•34m ago•1 comments

Proton Meet Isn't What They Told You It Was

https://www.sambent.com/proton-meet-isnt-what-they-told-you/
18•bundie•36m ago•0 comments

Say No to ZeroVer: Start with 1.0.0

https://blog.nytsoi.net/2026/04/03/say-no-to-zero-ver/
1•thomasjb•40m ago•0 comments

France plans missile increase in new defense push

https://www.politico.eu/article/france-eyes-huge-missile-boost-new-defense-plan-document-shows/
4•vrganj•41m ago•1 comments

Show HN: My portfolio as a working terminal (vanilla JavaScript, one HTML file)

https://dzienko.dev/
2•Brosper•46m ago•2 comments

A Giant Leap Towards an AI-Native OS: AgenticInit (April Fools)

https://os.ewe.moe/blog/202604-april-fool
1•uneven9434•49m ago•0 comments

Life gave us lemon trees

https://nothingisnotafish.substack.com/p/life-gave-us-lemon-trees
2•gaodean•49m ago•0 comments

Agent as User, a new tool to help you run agent in isolated user environment

https://github.com/AgentaaU/AaaU
1•shylockhg•50m ago•1 comments

I Made a Terminal Pager

https://theleo.zone/posts/pager/
2•speckx•53m ago•0 comments

Cute Animal Heroic Interval

https://medium.com/luminasticity/cute-animal-heroic-interval-c38d0dc84d05
1•bryanrasmussen•56m ago•0 comments

OpenHarness: Open Agent Harness

https://github.com/HKUDS/OpenHarness
2•msolujic•57m ago•0 comments

Hardware supply chain attack in the wild

https://airguide.info/europes-easa-warns-stolen-engine-parts-may-re-enter-supply-chain/
2•jackpepsi•57m ago•0 comments

Fathom: AI hallucination detection from SAE activation geometry (pre-registered)

https://zenodo.org/records/19382453
3•fathom_geo•59m ago•0 comments

A CSS Engine in OCaml

https://gazagnaire.org/blog/2026-04-02-cascade.html
5•p4bl0•1h ago•0 comments

Ask HN: Has Claude Code become significantly worse for you as well?

3•bkfh•1h ago•1 comments

US Bans All Foreign-Made Consumer Routers

https://www.schneier.com/blog/archives/2026/04/us-bans-all-foreign-made-consumer-routers.html
5•jruohonen•1h ago•0 comments

A Simple and Universal Swarm Intelligence Engine, Predicting Anything

https://github.com/666ghj/MiroFish
4•amirouche•1h ago•0 comments