This eye-pleasing site, created for a Physics course, starts with a short explanation of drag and lift, then quickly moves on to other disciplines.
This Learn2 lesson is actually two tutorials in one.
Professor Kite teaches us how to pick the right kite for different days.
"Come in and see my sketches and descriptions of kites of every shape and size, many of them also including historical, anecdotal, allegorical or aeronautical snippets of information.