The user should not be kept waiting by the system. When incorporating graphics into the system, designers should consider the limitations of the equipment being used by students. Long or frequent waiting periods for the loading of graphics may disrupt the users concentration, impeding the learning process. The ability to customize the interface to support students needs and learning strategies increases the user s sense of ownership. Customizable interfaces enable users to make changes for the sake of increasing consistency, and provide the user with greater flexibility.
Teachers can adapt the software to meet specific needs of students or curriculum requirements.
This requires various levels of help. Because users will be viewing the web page through different browsers and with diverse screen sizes, the screen layout and presentation of material can not be controlled. Overloaded nodes may result in unseen or overlooked information, while under-loaded nodes increase the users navigational activities. Matching tool to task. The Internet is an effective medium for providing large amounts of information to students.