Lynx Toss
Predator–prey cycles. Toss predators onto a habitat of prey; the class screen shows the boom-and-bust cycle and the phase plot. Lynx and hare, wolves and moose, otters and urchins, or Gause's protists.
Live experiments for the classroom. Every phone is one sample; the class screen pools them.
Type the 4-letter room code on the screen.
Predator–prey cycles. Toss predators onto a habitat of prey; the class screen shows the boom-and-bust cycle and the phase plot. Lynx and hare, wolves and moose, otters and urchins, or Gause's protists.
Disease spread. Each phone is one person; vaccinate part of the class and watch herd immunity appear on a live S-I-R curve.
Disturbance. Each phone is a patch of rocky shore with its own storm frequency; the class screen shows the intermediate-disturbance hump.
Climate and range shifts. Each phone is a species on a warming mountain: move upslope or run out of mountain.
No accounts. Phones keep an anonymous ID so a group's habitat survives a reload.