Education
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Double Pendulum
An interactive double pendulum playground built with SVG, where you tweak the setup and watch a simple system swing into…
Double-Entry Bookkeeping as a Directed Graph
An explainer that recasts double-entry bookkeeping as money flowing along a directed graph of accounts, making debits an…
Doublepreps
The Horniman Museum explains doublepreps, odd natural history specimens that pair skeleton and taxidermy so you can see…
Doubles
A fast, minimalist mental-math game: type the double of each random number as quickly as you can, and see how long you l…
Douglas Hegdahl
The record of Douglas Hegdahl, a young sailor held in North Vietnam who played dumb so convincingly he was released, car…
Down The Scope
A virtual microscope with high-resolution histology slides from across the animal kingdom - zoom into a cat stomach, dog…
Downzoning Chicago
A research article by Yonah Freemark and George Kisiel on how postwar downzoning in Chicago reduced housing construction…
Doyald Young
A memorial site for the late lettering master Doyald Young, with his essays on craft, his mentors and reading list, and…
DoYogaWithMe
A library of hundreds of free high-quality yoga classes, meditation sessions, and courses filmed with experienced teache…
DQYDJ
A huge collection of free calculators and research on investing, income percentiles, net worth, retirement and real esta…
Dracula Daily
Bram Stoker's Dracula serialized in real time: each letter and diary entry is posted on the date it happens in the novel…
Dragon's Roost
The personal site of the Dragonheart Collective, a plural system, offering essays, zines, FAQs, and resources about plur…
Drake Equation Calculator
An interactive Drake Equation calculator that estimates how many advanced civilizations may exist in the Milky Way, with…
Draw Mix Paint
An oil painting resource teaching realism, with lessons and articles on drawing, color mixing and technique for aspiring…
Draw Paint Academy
Articles by Marc Dalessio that explain drawing and painting, from composition and color to materials, written as deep di…
Drawabox
A free structured drawing course teaching fundamentals through strict exercises in mark-making, perspective, and constru…
Drawdown Explorer
An interactive explorer that ranks climate solutions by emissions impact, cost and scale so you can compare what works b…
Drawing Matter
A publication and archive exploring the role of drawing in architectural thought and practice, with essays, drawings, an…
Drawing on the Right Side of the Brain Blog
A blog by art teacher and author Dr. Betty Edwards with her thoughts on drawing and creativity, from the creator of the…
DrawingsOf.com
Educational cartoons and illustrations by Lillie that teach English vocabulary and grammar, alongside creative drawings,…
Drawspace
A free drawing lesson site with a printable curriculum that takes beginners through step-by-step tutorials starting from…
Drew Gardner
Photographer Drew Gardner restages famous historical portraits with living descendants of figures like Napoleon and Thom…
Drift Towards Danger and the Normalization of Deviance
Explains Rasmussen's model of practical drift, how organizations slide toward unsafe operations and normalize rule-break…
Drill Your Own Well
A step-by-step DIY guide to hand-drilling a water well with PVC pipe and homemade drill bits, with photos, user-submitte…
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