Evaluation of page design concepts of a Web-based authoring shell

Inclusion of intelligence in computer-based learning and teaching systems, along with the employment of Internet and World Wide Web, has led to the development of Web-oriented educational systems like Web based authoring shells. In order to redesign a shell´s interface, usability evaluation, as a distinct validation process, is required. The methodology applied for the evaluation of a Web-based authoring shell´s page design concepts, along with the achieved results, is elaborated in this paper.