The increasing online access to courses, programs, and information has shifted the control and responsibility of learning process from instructors to learners. Learners' perceptions of and attitudes toward e-learning constitute a critical factor to the success of such system. The purpose of this study is to take TAM (technology acceptance model) as a foundation and include perceived convenience as a new external factor in predicting students' perceptions about the acceptance and use of Moodle, an open source e-learning system. A total of 47 college students and 35 senior high school students participated in this research. The results indicated that perceived convenience had a direct effect on perceived usefulness. Perceived ease of use, perceived convenience, and perceived usefulness had significantly positive impacts on attitude toward using Moodle. Continuance intention to use Moodle was directly influenced by attitude toward using Moodle. Several practical implications of the present study are offered at the end of paper. (Contains 2 figures.)