In this study, we redesigned successful paper-and-pencil activities and implemented them in an introductory multivariate calculus course supported by 3D dynamic geometry software. We used semi-structured interviews and students' written productions during the semester to analyze the use of technology in supporting students' learning. Considering the work of two students, we find that the software has transformative potential but that it did not promote students' learning as expected. We discuss possible reasons for this.