Micro-case: “25-line challenge”: students have 25 draws/undos to build an image; leaderboard rewards most improved or most unusual solution.

Micro-case: A class uses a 10-minute demo on watercolor washes, then a 30-minute timed exercise where students must incorporate one found object into a composition.

Beyond just games like Minecraft or Slope , these sites often act as web proxies, allowing users to browse other restricted sites.