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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/

Building Cryptographic Agility into Sigstore

https://blog.trailofbits.com/2026/01/29/building-cryptographic-agility-into-sigstore/
1•CiPHPerCoder•48s ago•0 comments

Ask HN: How do you evaluate whether a CV research idea is worth pursuing?

1•mostlyk•1m ago•0 comments

Adding dynamic features to an aggressively cached website

https://simonwillison.net/2026/Jan/28/dynamic-features-static-site/
1•ulrischa•2m ago•0 comments

South Korea's 'world-first' AI laws face pushback

https://www.theguardian.com/world/2026/jan/29/south-korea-world-first-ai-regulation-laws
1•lnguyen•3m ago•0 comments

Show HN: Guide to Writing Better AI Prompts

https://howtomakethebestprompt.com/
1•detroitwebsites•4m ago•0 comments

The Largest Zip Tie Is Nearly 4 Feet Long and $75

https://www.thedrive.com/news/youll-have-that-on-those-big-jobs-the-worlds-largest-zip-tie-is-nea...
1•PaulHoule•4m ago•0 comments

Shift more left with coding agents

https://gricha.dev/blog/shift-more-left-with-coding-agents
1•surprisetalk•5m ago•0 comments

FAQ: Memorization

https://pgadey.ca/notes/faq-memorization/
1•surprisetalk•5m ago•0 comments

Plantable Brings Plants and Tables Together in the Workplace

https://design-milk.com/plantable-brings-plants-and-tables-together-in-the-workplace/
1•surprisetalk•5m ago•0 comments

Attilio Berni plays the sub-contrabass saxophone [video]

https://www.youtube.com/watch?v=9BiW2mVKk0w
1•surprisetalk•5m ago•0 comments

Project Genie: Interactive worlds generated in real-time

https://labs.google/projectgenie
1•jedixit•6m ago•0 comments

TikTok Competitor UpScrolled Hits No. 1 on App Store

https://www.forbes.com/sites/conormurray/2026/01/29/tiktok-competitor-upscrolled-hits-no-1-on-app...
1•nullchan•6m ago•0 comments

Agentic Vision in Gemini 3 Flash

https://blog.google/innovation-and-ai/technology/developers-tools/agentic-vision-gemini-3-flash/
1•pretext•7m ago•0 comments

Joybubbles, early phone phreak, Documentary

https://www.joybubblesthemovie.com
1•ChrisArchitect•8m ago•1 comments

Show HN: Lytics – open-source Web Analytics with Heatmaps

https://lytics.cloud/
2•subprotocol•9m ago•0 comments

Project Genie: Experimenting with infinite, interactive worlds

https://blog.google/innovation-and-ai/models-and-research/google-deepmind/project-genie/
2•meetpateltech•10m ago•1 comments

Nvidia to shift 2028 chip production to Intel, reshaping TSMC strategy

https://www.digitimes.com/news/a20260128PD213/tsmc-intel-nvidia-packaging-2028.html
3•akyuu•10m ago•0 comments

Show HN: A voice-first budget tracking app

https://tallytalk.vercel.app/
1•mayankk25•11m ago•0 comments

Show HN: Autonomous recovery for distributed training jobs

https://docs.tensorpool.dev/features/agent
3•tsvoboda•11m ago•0 comments

AI-Assisted Development at Block

https://engineering.block.xyz/blog/ai-assisted-development-at-block
1•herbertl•12m ago•0 comments

Clear skies and autonomous Waymo rides at SFO

https://waymo.com/blog/2026/01/waymo-rides-at-sfo
2•boulos•12m ago•1 comments

Disenshittification Nation

https://pluralistic.net/2026/01/29/post-american-canada/#ottawa
2•bovermyer•13m ago•0 comments

Rad Power Bikes was valued at $1.6B and now, assets are sold for $13M

https://micromobility.io/news/rad-power-bikes-assets-to-be-sold-for-13-2m-after-chapter-11-filing
2•prabinjoel•14m ago•0 comments

Ingress Nginx: Statement from Kubernetes Steering, Security Response Committees

https://kubernetes.io/blog/2026/01/29/ingress-nginx-statement/
2•shscs911•15m ago•0 comments

Show HN: vind – A Better Kind (Kubernetes in Docker)

https://github.com/loft-sh/vind
9•saiyampathak•15m ago•0 comments

I wrote a n8n external-secrets <-> HashiCorp Vault shim so you don't have to

https://medium.com/@lustine67/i-shouldnt-have-to-write-this-forcing-n8n-s-external-secret-to-resp...
1•polux33•15m ago•0 comments

Secure, Customizable and Reliable WebRTC Video Calls| Whereby

https://whereby.com/
1•janandonly•17m ago•0 comments

Are Luxury Smartwatches a Thing of the Past?

https://www.nytimes.com/2026/01/28/fashion/luxury-smartwatches-tag-heuer.html
1•bookofjoe•17m ago•1 comments

Observation of Strong Nonreciprocal Thermal Emission

https://par.nsf.gov/biblio/10626678-observation-strong-nonreciprocal-thermal-emission
1•georgecmu•18m ago•0 comments

MicroPythonOS graphical operating system delivers Android-like user experience

https://www.cnx-software.com/2026/01/29/micropythonos-graphical-operating-system-delivers-android...
2•mikece•18m ago•0 comments