Architecting usability properties in the e-learning instructional design process.

Distance education is profoundly reshaped by the digital revolution, in particular the new paradigm that e-learning adds to the environment. E-learning takes place when a teacher and student(s) are separated by physical distance (Gilbert, 1995). Web-based distance learning uses the Internet to deliver instruction to the learner. Today, the most popular form of e-learning is web-based distance learning. E-learning through the Internet is either asynchronous, synchronous, or both, and it is place-independent. E-learning can be provided to anyone in anyplace at anytime (Rosenkrans, 2