The use of digital media for representation is already strongly established among architects and students of architecture, however, despite the rapid technological developments and growing research, the use of advanced digital technology to generate and manipulate complex forms is still far less present in the learning and teaching of architectural design. This study presents a didactical approach for introducing generative design as a method for form exploration through parametric geometric representation. The activity presented in this paper was exercised with second and fifth semester students, working with form generation and variation using Grasshopper as a parametric design tool.