The book provides an overview of mathematical models for population studies, their historical development, and their inventors, developers, and discoverers. It explains the necessary terms and diagrams related to population studies. The structures of a population and their composition are simplified and clarified. The runtime environments Wolfram Mathematica and GeoGebra are compared and evaluated for their intended use. The main goal is to implement two models in GeoGebra that engage students and invite them to conduct their own experiments. The importance of interactivity and continuous development is emphasized. A glimpse into the future version of the program is also provided.