AbstractThe purpose of this research was to develop learning portal for students of Institut Pendidikan Guru Kampus Sultan Mizan Besut Terengganu and to determine the portal’s effectiveness and quality based on the theory of constructivism. The portal was developed using open source software, “moodle” as a platform. All the teaching materials used in the portal were developed by the researcher. The study used quasi experimental design to determine the effectivenes of the portal. A sample of 83 respondents of the Institut Pendidikan Guru Kampus Sultan Mizan’s Semester 1 Ijazah Sarjana Muda Perguruan Preparatory Programme (PPISMP) July 2008 took part in the study. The t-test show that the measure of the post test result of the experimental group was higher than the control group (t (136)= 6.03, p=.00). This shows that the learning portal has an effect on the students’ learning. The study also shows that the learning portal is able to create a condusive learning environment and its usag.....