When we use computers in education, we are not only looking for more information than we can find in books, or more up-to-date information: ideally, the computer should offer us some interactivity - it should communicate with us. For example, students should be given feedback on their work. Here are links to some interactive pages that I have produced myself. Some of the grammar and vocabulary exercises are basically my own HTML versions of exercises in Targets workbook from Aschehoug:
If you know of other interesting sites with interactive features, or if you have comments, please email me.