Despite the complexity of parametric modeling, used potentially to generate non-standard geometries, this paper presents a simple approach to adopt this tool as a support for teaching technical drawing contents. This experimental study was applied in a technical and high school education context, focusing on three subjects: 1) irregular polyhedra, 2) points in descriptive geometry, and 3) line in descriptive geometry. Exercises were implemented before and after the parametric experience with students, and the answers to both scenarios were compared. The results addressed to the efficiency of parametric modeling as a supporting tool in the teaching/learning process.