With the proliferation of technology, electronic texts in the form of hypertext and hypermedia systems as well as digital libraries are increasingly being used in scientific inquiry. Digital or hypertext documents are nonlinear and flexible, and enable students to follow their own investigation paths. However, the flexibility also poses challenges…

Learning with existing web-based resources has become popular and important, for example, in cases where there are diverse learning resources dealing with the same learning topic. However, many resources do not have a clear description of their characteristics, which makes it difficult for learners to select appropriate resources. This article…