Hyper-TVT is a computer-aided education system that has been developed at the Institute of Process Engineering at the ETH Zurich. The aim was to create an interactive learning environment for chemical and process engineering students. The topics covered are the most important multistage separation processes, i.e. fundamentals of separation processes; absorption and stripping; flash evaporation; distillation; liquid-liquid extraction. Hyper-TVT uses multimedia and web technology as a didactic support to enhance the teaching effectiveness and the flexibility of the two traditional pedagogic media, i.e. lectures and textbooks. Technically, Hyper-TVT has been realized with a number of programming tools and software, i.e. PHP, MySQL, Flash, Javascript, and MathML, to facilitate its management and to maximize interactivity. Since April 2003, the web site is online (www.hyper-tvt.ethz.ch) and has been extensively used by students both within and outside ETH Zurich.