1) It is easy to "copy" the material - also the pictures. Though the quality could be much better the basic interpretation of Mariana is quite apparent in this simple JPG-version.
2) It is possible to incoporate more images without extra cost - thus the material the students are working with becomes much more entertaining - without sacrifice of academic quality.
3) If the teacher has an e-mail account he/she can be reached all over the world.
b) The individual teacher who wants to use the material is free to make any desired changes to the assignments and to incorporate his/her own mail-box details instead of firstname.lastname@example.org at the end of the page. (Simply download the file "Mariana.zip", un-zip it, and make the necessary changes to the main html document "Mariana.htm" and let the students work with all the documents off a local disc-drive. (If your browser is Netscape it'll keep track of the directory etc. all by itself!) The on-line links ought to work as well.
Hans J. Klarskov Mortensen.