Abstract This study dealt with the effect of computer – mediated instruction on improving Arabic language writing skills of university juniors in Arabic language classes. It also surveyed data concerning student perceptions about the technology – enhanced environment of learning. Objectives of the study were to determine: a) the effect of technology – enhanced instruction on developing students writing and communication skills. B) The effects of technology on student perceptions in language learning environment. C) Draw conclusions concerning online design. Computer – enhanced instruction and learning had a significant positive effect on improving learners' writing and communication skills. Students attributed important roles to instructor's plans. Independent learning skills were also enhanced. Implications for online design and other types of technology – enhanced learning and teaching were presented.