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Bloom's two sigma problem (2020)

https://nintil.com/bloom-sigma
8•Tomte•10mo ago

Comments

trane_project•10mo 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/

A resume builder for pets, for those who need to prove their animal isn't feral

https://petresume.co/
1•droopyKnees•1m ago•1 comments

The Khan Ted Institute

https://khanted.org/Home
1•capex•8m ago•0 comments

Ask HN: API Request for Feedback OK in Show HN?

1•casefile_dev•9m ago•1 comments

Opentargets-py – Python SDK for the Open Targets drug discovery database

https://pypi.org/project/opentargets-py/
1•goknurarican•13m ago•0 comments

Old Computers Sucked

https://oldcomputerssucked.com/
1•st_goliath•13m ago•0 comments

Is ChatGPT's web front end being intentionally degraded?

https://chatgpt.com
1•linzhangrun•16m ago•1 comments

Rise against the Machines: The Luddites [video]

https://www.youtube.com/watch?v=oeFTuD4Mnug
1•linsomniac•19m ago•0 comments

At the HumanX conference, everyone was talking about Claude

https://techcrunch.com/2026/04/12/at-the-humanx-conference-everyone-was-talking-about-claude/
1•Rafsark•19m ago•0 comments

The Cost of Cheap Clone Boards: Streaming Video on an STM32H750

https://msj.prose.sh/debug_streaming_weact_stm32h750
1•melastmohican•20m ago•1 comments

Robotaxi is now rolling out in Dallas and Houston

https://twitter.com/robotaxi/status/2045564609504116771
2•iknowstuff•22m ago•2 comments

AI chip startup Cerebras files for IPO

https://techcrunch.com/2026/04/18/ai-chip-startup-cerebras-files-for-ipo/
1•AnhTho_FR•22m ago•0 comments

Show HN: I built a CLI to fake Git commits

https://github.com/TDiblik/git-forge
2•TDiblik•27m ago•0 comments

No more bill shocks budget alerts comes to Cloudflare

https://projektisle.com/2026/04/no-more-bill-shocks-budget-alerts-comes-to-cloudflare/
1•todotask2•29m ago•0 comments

PostgreSQL Just Got Its Biggest Upgrade That Will Change DB Performance in 2026

https://medium.com/@CodingWithAbhi/postgresql-17-performance-upgrade-2026-f4222e71f577
1•breve•31m ago•0 comments

That 90s Chat Program You Don't Remember

https://www.youtube.com/watch?v=fMKiz7KTSz4
1•1o1o1o1o1•34m ago•0 comments

Deutsche Telekom has a bad DKIM key

https://infosec.exchange/@badkeys/116407565746342278
4•icco•35m ago•0 comments

Show HN: nvsx – A hook layer for NVSentinel GPU fault remediation

https://github.com/nav-beep/nvsx
1•essekar•37m ago•0 comments

MuJoCo – Advanced Physics Simulation

https://github.com/google-deepmind/mujoco
1•modinfo•37m ago•0 comments

Mailinator's Universal IDP

https://www.mailinator.com/introducing-mailinators-universal-idp/
3•zinxq•42m ago•0 comments

Hire a Freelancer Quantitative Developer

https://mathematicsconsultants.com/2026/04/19/hire-a-freelance-phd-quantitative-developer-or-rese...
1•GeniusConsult•45m ago•0 comments

The Social Battery and Symbolic Systems: Religion as Mediated Reciprocity

https://www.academia.edu/165768082/The_Social_Battery_and_Symbolic_Systems_Religion_as_Mediated_R...
1•W_G_III•48m ago•0 comments

Decision Density

https://jamesshelley.com/decision-density.html
1•zdw•48m ago•0 comments

Show HN: Slop Cop Claude Code / Cursor Plugin

https://github.com/yasyf/slop-cop
2•yasyfm•51m ago•0 comments

HTML5 Coupler Loop – Working

https://neocities.org/
4•rogmash•51m ago•7 comments

Sandboxes and Worktrees: My Secure Agentic AI Setup in 2026

https://mikemcquaid.com/sandboxed-agent-worktrees-my-coding-and-ai-setup-in-2026/
3•jdorfman•52m ago•0 comments

Five Days That Remade the Supreme Court

https://www.nytimes.com/2026/04/18/us/politics/supreme-court-shadow-docket.html
5•mitchbob•55m ago•1 comments

Changes in the system prompt between Claude Opus 4.6 and 4.7

https://simonwillison.net/2026/Apr/18/opus-system-prompt/
4•simonw•57m ago•1 comments

Show HN: Open Passkey – open-source passkey auth with free "backendless" host

https://github.com/locke-inc/open-passkey
2•connorpeters•59m ago•0 comments

OpenAI's April 2026 Policy Release: Industrial Policy for the Intelligence Age

https://www.landgate.com/news/energy-intelligence-for-open-ai-s-industrial-policy-blueprint
1•ninjahawk1•1h ago•0 comments

Testing Out the Armips Assembler on the Xorshift PRNGs

https://bumbershootsoft.wordpress.com/2026/04/18/testing-out-the-armips-assembler-on-the-xorshift...
1•ibobev•1h ago•0 comments