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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/

Withnail's Coat and I

https://ontherow.substack.com/p/withnails-coat-and-i
1•apollinaire•10s ago•0 comments

Show HN: What happens when you load a webpage (Interactive)

https://toolkit.whysonil.dev/how-it-works/internet-timeline/
3•otterwilde2•1m ago•0 comments

Show HN: NoSheetKit – personal tracking mini-apps that run in the browser

https://www.nosheetkit.com
1•rsosenke•2m ago•0 comments

Also Liked

https://foryou.club/also-liked
2•big_toast•8m ago•1 comments

Study: Infrasound likely a key factor in alleged hauntings

https://arstechnica.com/science/2026/04/that-spooky-sensation-likely-due-to-rumbling-pipes-not-sp...
2•ndr42•10m ago•0 comments

Below the Fold: Dashboard of NY Times Coverage 2000-26

https://tedalcorn.github.io/nyt/#tab=home
3•apwheele•10m ago•0 comments

DevResolve embed a support widget on your dev docs

https://devresolve.ai/
2•EthanWayne•11m ago•1 comments

Evolution of the vertebrate retina by repurposing ancestral median eye (2026)

https://www.cell.com/current-biology/fulltext/S0960-9822(25)01676-8?_returnURL=https%3A%2F%2Flink...
3•Eridanus2•14m ago•0 comments

Enabling Multi-Region Data Systems at Notion

https://www.notion.com/blog/enabling-multi-region-data-systems-at-notion
2•tanelpoder•14m ago•0 comments

The pgvector Tooling Landscape in 2026

https://github.com/grove/pg-trickle/blob/main/blog/pgvector-tooling-landscape.md
3•grove•14m ago•0 comments

Microsoft and OpenAI's famed AGI agreement is dead

https://www.theverge.com/ai-artificial-intelligence/918981/openai-microsoft-renegotiate-contract
2•einszwei•15m ago•1 comments

Google prepares credit system for Gemini and new image tools

https://www.testingcatalog.com/google-prepares-credit-system-for-gemini-and-new-image-tools-2/
2•gmays•17m ago•0 comments

China car giant BYD says it can thrive without US

https://www.bbc.com/news/articles/cy01ele412yo
8•devonnull•19m ago•1 comments

Are Chinese AI Models Risky?

https://www.rickmanelius.com/p/are-chinese-ai-models-risky
2•mooreds•20m ago•1 comments

Signed: A Portfolio for Investors

https://zachholman.com/posts/signed-a-portfolio-for-investors
2•mooreds•20m ago•0 comments

The legal showdown between Elon Musk and Sam Altman begins today

https://www.cbsnews.com/news/elon-musk-openai-lawsuit-trial-sam-altman/
4•rolph•20m ago•0 comments

Jetbrains Annual Report 2026

https://www.jetbrains.com/lp/annualreport-2026/
3•saikatsg•21m ago•0 comments

You have to have an account to read IMDB reviews now

https://old.reddit.com/r/enshittification/comments/1srjamd/you_have_to_have_an_account_to_read_im...
4•Markoff•21m ago•0 comments

Show HN: Open-source control layer for AI safely access production

https://github.com/hoophq/hoop
2•luisfdias•22m ago•0 comments

Do-Nothing Software Development

https://alexwennerberg.com/blog/2026-04-24-donothing.html
2•speckx•22m ago•0 comments

What Will It Take to Get A.I. Out of Schools?

https://www.newyorker.com/culture/progress-report/what-will-it-take-to-get-ai-out-of-schools
5•HotGarbage•22m ago•0 comments

OpenAI's Revolutionary AI Gadget Is a Phone?

https://gizmodo.com/openai-revolutionary-ai-gadget-is-a-phone-a-stinkin-phone-2000751129
2•dlx•23m ago•0 comments

Don't Stop Me from Pasting Passwords

https://ciamweekly.substack.com/p/dont-stop-me-from-pasting-passwords
2•mooreds•23m ago•0 comments

Functional Programming in Lean

https://leanprover.github.io/functional_programming_in_lean/
3•gurjeet•23m ago•0 comments

Sampling-Based NDV Estimation in Iceberg Tables

https://eng-floe.github.io/floecat/2026/04/20/estimating-ndv.html
2•tanelpoder•24m ago•0 comments

My Stratum-0 Atomic Clock

https://coverclock.blogspot.com/2017/05/my-stratum-0-atomic-clock_9.html
2•g0xA52A2A•25m ago•0 comments

Reported losses to scams on social media eight times higher than in 2020

https://www.ftc.gov/news-events/data-visualizations/data-spotlight/2026/04/reported-losses-scams-...
5•pseudolus•26m ago•0 comments

Tera – A Compiler‑Native UI Framework with Shared Runtime/AI Context

https://github.com/terajs/terajs
2•thecodergabe•28m ago•0 comments

Claude prompt-cache writes may not be immediately visible to the next request

https://github.com/anthropics/anthropic-sdk-python/issues/1451
2•myyke•28m ago•0 comments

Out-of-Place Artifact

https://en.wikipedia.org/wiki/Out-of-place_artifact
2•thebigship•28m ago•0 comments