Abstract This research investigated the impact of Moodle cloud program on enhancing the academic writing skills of prep year students, Faculty of Engineering, Mansoura University and their Self -Efficacy towards learning. Participants of the research were two groups of students (one served as experimental and one control). Instruments of the research were an academic writing skills' checklist, an EFL Academic writing test, an academic writing skills rubric and a self-efficacy scale. The experimental group was taught using the online Moodle Cloud program and the control group was taught using the regular method. Both tests and scales were post-administered to both groups after the program have been implemented. The results of the research indicated that experimental group outperformed the control one. This showed that the online Moodle cloud program was effective in improving the academic writing skills and developing the Self-Efficacy of the participants. Therefore, it is concluded that applying Moodle cloud is effective in improving the academic writing skills for Engineering Students and enhancing their Self -Efficacy towards learning. Key words: Moodle cloud – Academic Writing Skills – Self-Efficacy Introduction English for academic purposes (EAP) is typically regarded as a branch