Simulations are an important resource in a science curriculum. Enabling student access to experiences with natural phenomena over time, unique geographic locations or reducing the risk of hazardous materials in the classroom. A simulation is a distinct kind of digital media, modeling a phenomenon over time. It is inquiry-driven, allowing student users to interact with "control variables." The user inputs or controls the value of a variable in the simulation. This promotes open-ended discovery that students can observe. The resulting effects enables experimentation beyond what is available in the classroom. Outputs of the simulation are in the observable phenomena and data recording (tables, charts, etc.) where applicable.