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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•7mo ago

Comments

trane_project•7mo 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/

Proof of Concept to Test Humanoid Robots

https://thehumanoid.ai/humanoid-and-siemens-completed-a-proof-of-concept-to-test-humanoidrobots-i...
1•0xedb•55s ago•0 comments

OpenAI Partners with Cerebras

https://www.cerebras.ai/blog/openai-partners-with-cerebras-to-bring-high-speed-inference-to-the-m...
1•nezhar•2m ago•0 comments

Show HN: Turn GitHub Contributions Graph into Space Shooter Battle Field

https://github.com/czl9707/gh-space-shooter
1•zane__chen•4m ago•0 comments

Sony wiped over 1k shovelware games off the PlayStation store without warning

https://www.eurogamer.net/sony-wiped-over-1000-shovelware-games-off-the-playstation-store-without...
1•croes•6m ago•0 comments

Playing daily games at work? Timdle just launched work mode

https://www.timdle.com/work
2•maskinberg•7m ago•0 comments

Context Engineering for Personalization with OpenAI Agents SDK

https://cookbook.openai.com/examples/agents_sdk/context_personalization
1•gmays•7m ago•0 comments

When programs assume the system will never change, episode 4: Stealing strings

https://devblogs.microsoft.com/oldnewthing/20260115-00/?p=111988
1•zdw•9m ago•0 comments

I added partial (incomplete) row streaming to a query engine

https://blog.vega.io/posts/partial_stream/
1•tontinton•12m ago•0 comments

Al models were given four weeks of therapy: the results worried researchers

https://www.nature.com/articles/d41586-025-04112-2
1•simonebrunozzi•13m ago•0 comments

State and Federal Lawmakers Want Data Centers to Pay More for Energy

https://www.nytimes.com/2026/01/15/business/energy-environment/data-center-energy-electricity-cos...
1•donohoe•13m ago•0 comments

US suspends immigrant visa processing for 75 countries beginning January 21

https://travel.state.gov/content/travel/en/News/visas-news/immigrant-visa-processing-updates-for-...
1•mportela•15m ago•1 comments

Ask HN: Is Claude Code bad for ADHD?

1•chriswright1664•15m ago•0 comments

Show HN: TeletextSignals – Local RAG over 25 Years of Swiss Teletext News

https://github.com/r-follador/TeletextSignals
1•folli•17m ago•0 comments

TWC Security Party – Group education event for tech workers to improve their PR

https://us02web.zoom.us/meetings/83864945846/invitations?signature=4UIf8C8zlkKWDox7ZdErZvL2DhcwC8...
1•todsacerdoti•17m ago•0 comments

Using Tokio with CPU-Bound Tasks in Rust (2022)

https://www.influxdata.com/blog/using-rustlangs-async-tokio-runtime-for-cpu-bound-tasks/
1•Abbit•21m ago•0 comments

Pg-safeupdate: A PostgreSQL extension requiring criteria for UPDATE and DELETE

https://github.com/eradman/pg-safeupdate
1•tanelpoder•21m ago•1 comments

Situation Watch

https://www.situation.watch/
1•brodouevencode•23m ago•0 comments

Interaction System for Treadmill Video Games Using a Smartphone Camera

https://www.mdpi.com/1424-8220/26/1/20
1•PaulHoule•26m ago•0 comments

Trump Officials Vow to Keep All US Coal Plants Running

https://www.bloomberg.com/news/articles/2026-01-15/trump-officials-vow-to-keep-all-us-coal-plants...
2•toomuchtodo•26m ago•1 comments

StackWarp: Exploiting Stack Layout Vulnerabilities in Modern Processors

https://roots.ec/blog/stackwarp
1•matt_d•26m ago•0 comments

Open Source Strategies

https://tempestphp.com/blog/open-source-strategies
1•7777777phil•26m ago•0 comments

Microsoft may soon allow IT admins to uninstall Copilot

https://www.bleepingcomputer.com/news/microsoft/microsoft-may-soon-allow-it-admins-to-uninstall-c...
1•janandonly•26m ago•0 comments

Database Transactions

https://planetscale.com/blog/database-transactions
2•ksec•27m ago•0 comments

At the Turning of the Tide: How to Fight Our Way Out of the Trump Era

https://crimethinc.com/2025/12/16/at-the-turning-of-the-tide-how-fight-our-way-out-of-the-trump-era
4•angoragoats•27m ago•0 comments

Sign of the times: Amazon is making a fallout shelter reality TV show

https://www.engadget.com/entertainment/tv-movies/amazon-is-making-a-fallout-shelter-competition-r...
2•dreadsword•28m ago•0 comments

Hyperfocus vs. Perspective as a Staff Engineer (2023)

https://softwaredoug.com/blog/2023/06/15/hyperfocus-vs-perspective
1•softwaredoug•28m ago•0 comments

Show HN: Bldr – polyglot build system for monorepos

https://github.com/GriffinCanCode/bldr
1•griffincancode•28m ago•0 comments

Show HN: Grain Synonym: Create multi-aesthetic OS variants

https://codeberg.org/teambrick06/yz/src/branch/main/docs/core-coordination/2026-01-15-121503-pst_...
1•kae3g•28m ago•0 comments

Show HN: Crystal Unified – Search compressed archives without decompressing

https://github.com/powerhubinc/crystal-unified-public
1•danebl•31m ago•0 comments

Show HN: GoGen – A simple template-based file generator written in Go

https://github.com/zaheershaikh936/gogen
2•zaheer9360•31m ago•1 comments