Much more information is needed. What specific academy? What discipline? Police, fire, parking enforcement? Is it a private company or municipally affiliated?
An academy affiliated with a specific department probably uses a frequency that the agency is licensed for. Look for a designation such as "training." They could also use tactical channels. In my specific academy, we use a low power simplex frequency when running scenarios on campus, but utilize a repeated citywide tactical frequency when we transition to field scenarios.