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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/

Palantir's Alex Karp: Technological Republic, in Brief

https://twitter.com/PalantirTech/status/2045574398573453312
2•simonebrunozzi•2m ago•0 comments

OpenCode-power-pack – Claude Code skills ported to OpenCode

https://github.com/waybarrios/opencode-power-pack
1•waybarrios•2m ago•0 comments

Interaction Nets and Hardware

https://tendrils.co/background
2•nilscrm•3m ago•0 comments

AI doom warnings are getting louder. Are they realistic?

https://www.nature.com/articles/d41586-026-01257-6?WT.ec_id=NATURE-20260423&utm_source=nature_eto...
1•Anon84•3m ago•0 comments

Show HN: realistic_blas: Exact infinite-precision LA, useful errs, f64 fast path

https://github.com/timschmidt/realistic_blas
1•timschmidt•5m ago•0 comments

SensibleJS – Reactive UI in ~10KB with Plain HTML Attributes

https://github.com/ricardoaponte/sensiblejs
2•ricardoaponte•6m ago•0 comments

Show HN: iOS app that visualizes your brainrot

https://apps.apple.com/us/app/oh-my-hours/id6760450002
1•jarko27•6m ago•0 comments

If more than 50% press blue, everyone survives. Red pressers always survive

https://shankwiler.com/posts/button-survival-hypothetical/
1•iuvcaw•6m ago•0 comments

My brave new code-signing world

https://nullprogram.com/blog/2026/04/25/
1•ibobev•7m ago•0 comments

The Beijing Auto Show is a glimpse at the future of the auto industry

https://electrek.co/2026/04/26/beijing-auto-show-2026-insane-glimpse-future-auto-industry/
1•dabinat•7m ago•0 comments

Primus Projection: Estimate Memory and Performance Before You Train

https://rocm.blogs.amd.com/software-tools-optimization/primus-projection/README.html
1•matt_d•9m ago•0 comments

2026 Japan Stationary Award Winners [video]

https://www.youtube.com/watch?v=NDptFWx69kE
1•simonjgreen•9m ago•0 comments

Show HN: pg_savior: a seatbelt for Postgres – blocks accidental DELETE/UPDATE

https://github.com/viggy28/pg_savior
1•vira28•11m ago•0 comments

Namastex.ai NPM Packages Hit with TeamPCP-Style CanisterWorm Malware

https://socket.dev/blog/namastex-npm-packages-compromised-canisterworm
1•My_Name•12m ago•0 comments

Orwell: You and the Atom Bomb

https://www.orwellfoundation.com/the-orwell-foundation/orwell/essays-and-other-works/you-and-the-...
1•simonebrunozzi•12m ago•0 comments

I built a Wayland window manager you can extend with WebAssembly

https://github.com/miracle-wm-org/miracle-wm
1•matthewkosarek•14m ago•0 comments

Browser Mutation, a Codex plugin for turning visual UI edits into code changes

https://github.com/JosPMSilva/Browser-mutation
1•JosPMSilva•15m ago•1 comments

Dillo Browser Release 3.3.0

https://dillo-browser.org/release/3.3.0/
2•rodarima•17m ago•0 comments

Show HN: I made Claude Code listen before it codes (MIT)

https://github.com/basegraphhq/relay-plugin
2•nithin_2001•18m ago•0 comments

Show HN: SlothDB is a super fast embedded SQL database

2•souravroy78•18m ago•1 comments

Show HN: Parlor Jarvis – Realtime AI (audio+screen in, voice out) & multilingual

https://github.com/typomonster/parlor-jarvis
2•unusual_typo•22m ago•1 comments

Ask HN: Why hasn't automation testing been disrupted with LLMs?

1•grandimam•23m ago•0 comments

GPT cannot even count beans correctly

https://chatgpt.com/share/69ee4690-60ac-83ea-b28c-f4ce6284a75a
1•OutOfHere•26m ago•0 comments

Sub two-hour marathon record broken

https://www.espn.com/olympics/trackandfield/story/_/id/48598786/sabastian-sawe-wins-london-marath...
2•staplung•26m ago•0 comments

Google's new gradient icons for Gmail, Calendar, Drive, and other apps

https://9to5google.com/2026/04/26/gmail-google-gradient-redesign/
2•meetpateltech•29m ago•1 comments

Sabastian Sawe becomes the first man ever to break 2 hours in a marathon

https://twitter.com/ChrisChavez/status/2048357328894759363
1•ndr42•30m ago•0 comments

PRowhammer: Propagating Bit-flips from CPU to GPU [pdf]

https://www.cse.iitb.ac.in/~biswa/ISCA2026.pdf
1•matt_d•30m ago•0 comments

Proposed New Test of AI Capabilities:)

1•VikRubenfeld•32m ago•0 comments

Seemingly Conscious AI Risks

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6588659&trk=comments_comments-list_comment-text
2•andy99•33m ago•0 comments

Dockframe, modular USB-C hub based on framework adapter cards

http://dockframe.com
2•heatmiser•36m ago•1 comments