This paper presents a World Wide Web-based electronic feedback system for use in lectures and practical classes. The system is based on Java and provides a configurable feedback form, a managing tool for administrators, and a statistics viewer for presenting the generated statistical data in various ways. In addition, it generates a statistical history, which is an important instrument in comparing lectures and in tracing effects of improvements or alterations of the lecture. This paper shows how anonymity can be guaranteed to the user and outlines the resulting problems. It concludes with possible improvements to prepare the system for more general use. (Author/AEF)