The current paper describes the design and development of a qualitative analysis course and an interactive web-based teaching and assessment tool called VSE (virtual structural environment). The widespread reliance on structural analysis programs requires engineers to be able to verify computer output by carrying out qualitative analyses. Qualitative analysis is also an important design skill. The course was developed using a problem-based learning approach. VSE offers a student-centred, active learning environment that supports students in becoming self-directed learners and effective problem-solvers. VSE allows students to construct simple structural models quickly and observe the response of their structures to changes in load in real time. VSE supplements the use of physical models, it can be used in conjunction with a library of predefined structures and it can be incorporated into assessment exercises. (Contains 12 figures.)