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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•1y ago

Comments

trane_project•1y 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/

Digging Up the Past: Windows Registry Forensics Revisited (2019)

https://cloud.google.com/blog/topics/threat-intelligence/digging-up-the-past-windows-registry-for...
1•ankitg12•3m ago•0 comments

Show HN: Memsprout – share AI context with your teammates

https://memsprout.com/docs
1•mat10112•3m ago•0 comments

Infomaniak announces its planned listing on the Swiss stock exchange

https://news.infomaniak.com/en/infomaniak-announces-its-planned-listing-on-the-swiss-stock-exchange/
2•sp8•6m ago•0 comments

Show HN: Abendrot – The free and open-source macOS app for your circadian rhythm

https://github.com/matthewrball/abendrot
1•balldelegance•7m ago•0 comments

Is Samsung Pioneering Mass Adoption of USDC?

https://irishtechnews.ie/is-samsung-pioneering-mass-adoption-of-usdc/
1•belkin1•8m ago•0 comments

Guide: How to Use Libgpiod with C

https://fiosproject.de/posts/libgpiod/
1•ls-root•10m ago•0 comments

Why Don't People Use Formal Methods?

https://www.hillelwayne.com/post/why-dont-people-use-formal-methods/
1•Thom2503•11m ago•0 comments

Register deprivation: spills and runtime under forced register scarcity

https://rjp.io/blog/2026-07-19-register-deprivation
1•surprisetalk•12m ago•0 comments

Show HN: Edgemetry – self-hosted web analytics on Cloudflare's free tier

https://github.com/hayaran/edgemetry
2•theone•12m ago•0 comments

Building secure Uniswap v4 hooks

https://blog.trailofbits.com/2026/07/30/building-secure-uniswap-v4-hooks/
2•ErenayDev•14m ago•0 comments

Israel defender Bret Stephens calls out 'Jewish terrorists' in West Bank

https://www.timesofisrael.com/stalwart-israel-defender-bret-stephens-calls-out-jewish-terrorists-...
1•tcp_handshaker•15m ago•0 comments

Superrationality

https://en.wikipedia.org/wiki/Superrationality
1•kibwen•16m ago•0 comments

US FCC approves giant space mirror to deliver 'sunlight on demand'

https://www.cbc.ca/news/science/reflect-orbital-approval-fcc-9.7287535
2•throw0101d•17m ago•1 comments

Is open-weight AI banned yet?

https://isopenweightaibannedyet.com/
4•imtany•17m ago•1 comments

Why every Wikimedian should be a toolmaker

https://www.haykranen.nl/2026/07/30/wikimania-2026-every-wikimedian-toolmaker/
1•janvdberg•18m ago•0 comments

Show HN: A browser extension that flags GitHub repos with suspicious star growth

https://ayoublidjici-dotcom.github.io/repo-reality-check/
3•KageFX•18m ago•0 comments

How Old Is Ann?

https://quuxplusone.github.io/blog/2026/07/29/how-old-is-ann/
1•ibobev•18m ago•0 comments

Wallpets: Expressive animal companions that live in your Mac wallpaper

https://wall-pets.com/
1•mihau•18m ago•0 comments

What it means for an API to be RESTful

https://en.andros.dev/blog/9761fd2e/what-it-means-for-an-api-to-be-restful/
1•ibobev•19m ago•0 comments

CosmosEscape: Taking over Every Database in Azure Cosmos DB

https://www.wiz.io/blog/cosmosescape-taking-over-every-database-in-azure-cosmos-db
1•uvuv•19m ago•1 comments

Fixing long-standing shader issues and "Device Removed" crashes in Path of Exile

https://twitter.com/i/status/2082706381766029798
1•Sverigevader•19m ago•0 comments

Parsers don't have to be complicated

https://bkaradzic.github.io/posts/scanner/
1•ibobev•19m ago•0 comments

Poland blames Russia for firing missile into its territory

https://www.cnn.com/2026/07/29/europe/ukraine-kyiv-missile-attack-latam-intl
1•tcp_handshaker•19m ago•0 comments

Steam Client Adds HDR Streaming on Steam Deck OLED, AV1 Video Streaming

https://www.phoronix.com/news/Steam-Beta-Video-Streaming
1•DemiGuru•21m ago•0 comments

EU Icons for labelling AI-generated content

https://digital-strategy.ec.europa.eu/en/policies/eu-icons-labelling-ai-generated-content
2•pekko•22m ago•0 comments

design of Plan 9 and how I use it (2022)

https://hackerpublicradio.org/eps.php?id=3675
2•bmacho•23m ago•1 comments

Collusion with Competitive Marginals: Price-Level Audits Are Blind

https://arxiv.org/abs/2607.26385
1•sbulaev•25m ago•0 comments

UK on track for record heat-related deaths this year, UKHSA estimates

https://www.bbc.co.uk/news/articles/c0m78g01r8jo
2•ljf•27m ago•0 comments

Show HN: HuPow – Proof-of-Work to stop AI bots in your inbox

https://hupow.app
2•cmbza•27m ago•0 comments

The Cities That Said Yes to Drugs

https://www.theatlantic.com/magazine/2026/09/city-drug-addiction-harm-reduction-policy/687967/
3•SanjayMehta•27m ago•0 comments