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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/

Show HN: World Sizer – A world map where area reflects population, GDP, and more

https://douwe.com/projects/worldsizer
1•dosinga•39s ago•0 comments

Chinese Gov issue warning: Don´t talk to aliens if you see one [video]

https://www.tiktok.com/@juliettheband/video/7676891956911295758
1•trilogic•1m ago•0 comments

Show HN: Ringdl2 – A lightweight Linux downloader in Rust using io_uring

https://github.com/infomaniac777/ringdl2/blob/master/README.md
1•infomaniac777•2m ago•0 comments

The Web-Search Latency Your Agent Pays

https://telem.ai/blog/latency-research
1•mohanz•3m ago•0 comments

Japan's music cafés are striking a chord abroad

https://www.economist.com/culture/2026/08/20/japans-music-cafes-are-striking-a-chord-abroad
2•andsoitis•7m ago•0 comments

Ask HN: Guess what makes SSH multiplexing physically impossible

1•logicallee•7m ago•0 comments

Ask HN: Any opinions on Muse Code over others?

1•senor_digimon•12m ago•0 comments

A Tale of Two Flink Autoscalers

https://netflixtechblog.com/a-tale-of-two-flink-autoscalers-e9f6a1b1492b?source=rss-c3aeaf49d8a4-...
1•sbulaev•15m ago•0 comments

Malware infects Android-based automotive head unit firmware

https://securelist.com/android-head-unit-malware/121106/
10•campuscodi•16m ago•0 comments

Things a Computer Scientist Rarely Talks About, by Donald E. Knuth

https://www.christiancentury.org/reviews/2011-04/things-computer-scientist-rarely-talks-about-don...
2•senor_digimon•18m ago•1 comments

Yomif Kejelcha regains world half marathon record with 56:51 in Buenos Aires

https://worldathletics.org/competitions/world-athletics-label-road-races/news/world-half-marathon...
1•wslh•19m ago•0 comments

Go Ahead, Sean Duffy. Let Your Daughter Go to Harvard

https://www.nytimes.com/2026/08/23/opinion/harvard-education-ideology-political-polarization.html
1•berkeleyjunk•19m ago•0 comments

Show HN: Rmp, a Subsonic music player for generating playlists on the fly

https://github.com/codesoap/rmp
1•codesoap•21m ago•0 comments

AwardMath – Award Travel Planner

https://awardmath.com
1•info-cast-hub•22m ago•0 comments

Soofi S 31.6B. German Open Moe Explained

https://kie.ai/blog/what-is-soofi-s-31-6b
1•pelasaco•24m ago•0 comments

Vibedecode

https://vibe-decode.com/
1•implexlabs•25m ago•1 comments

There is now over 2,100 hours of video evidence on Archive Genocide

https://archivegenocide.com/
3•34679•25m ago•0 comments

Ask HN: Is Apple Messages plugin for ChatGPT a privacy risk?

https://twitter.com/stevemoraco/status/2091194172917338520
2•taubek•26m ago•0 comments

Ask HN: What a fullstack dev should know about security?

1•ah1508•27m ago•0 comments

All Your Heroes Were on Drugs

https://medium.com/belover/all-your-heroes-were-on-drugs-b1eafd9adf50
1•andsoitis•27m ago•0 comments

The rise and fall of rationality in language (2021)

https://www.pnas.org/doi/10.1073/pnas.2107848118
2•mpweiher•29m ago•0 comments

Show HN: Ever Wanted to Call Codex from Claude Code? My Harness Orchestrator

https://github.com/ptmrio/harness-subagent
3•SPQRK•31m ago•0 comments

Trump administration's 75-country visa ban was illegal, judge rules

https://www.npr.org/2026/08/22/nx-s1-5941765/trump-immigration-visa-ban-75-countries
6•garbawarb•35m ago•0 comments

ChatGPT Is a Japanese Internet Degen

https://theosteiner.de/chatgpt-is-a-japanese-degen-or-how-fried-chicken-sent-me-down-a-tokenizer-...
3•theo-steiner•36m ago•0 comments

My Contaminated Smile (<2003)

https://web.archive.org/web/20101126175812/http://www.mouthmag.com/issues/58/contam_smile.htm
2•verisimi•38m ago•0 comments

There's no substitute for real-world experience

https://mattcasmith.net/2026/08/23/no-substitute-real-world-experience
2•mattcasmith•39m ago•1 comments

The Bay Area's 'city of the dead'

https://www.sfgate.com/local/article/bay-area-colma-cemeteries-22364598.php
3•gmays•40m ago•0 comments

Personal care products are awash in unlabeled toxic chemicals, study finds

https://www.theguardian.com/us-news/2026/aug/23/personal-care-products-unlabeled-toxic-chemicals
3•pseudolus•41m ago•0 comments

The Interview That Wouldn't Die

https://returnzero.dev/articles/coding-interviews-in-the-age-of-ai
1•rotemmiz•44m ago•1 comments

Together – Community mental health support through shared therapeutic silence

https://together.lyfmail.com/
1•LYFMail•44m ago•0 comments