Free, but you must register to access and upload simulations/lesson plans.Content is devoted to math and all disciplines of science. Developed for grade levels K17.
Simulation game: Students read descriptions of gladiatorial weapons and armor to dress their gladiator for the arena. Dress the gladiator appropriately and the emperor will spare his life.
"Edheads is an online educational resource that provides free science and math games and activities that promote critical thinking. Choose from Simple Machines, Virtual Knee Surgery or Stem Cell Heart Repair, among others. All activities meet state and national standards."