Because teachers are the primary audience for teaching simulations as opposed to students, the design and development perspective differs from that of other educational software. Teaching simulations provide the teaching environment including virtual students to the teachers and pre-service teachers who are the users of the simulations. On the contrary, general educational software plays a role of a virtual teacher to the students who are the users of the software. The authors extracted design principles for teaching simulations from the literature and past research on teaching simulations, which led to the teaching simulation’s design and development process.