Modellus is a freely available application that enables students and teachers to use mathematics to create or explore models interactively. Modellus is used to introduce computational modeling for allowing an easy and intuitive creation of mathematical models using just standard mathematical notation, for creating animations with interactive objects that have mathematical properties expressed in the model, for allowing the exploration of multiple representations, and for permitting the analysis of experimental data in the form of images, animations, charts, and tables.
