Weblogs are a popular form of easy-to-use personal publishing that has attracted millions of bloggers to share their personal thoughts, opinions, and knowledge on the web. The versatility of weblogs as a communication medium has attracted interests from educators. Educational applications of weblogs have so far included journals, e-portfolio, learning diaries, and logbooks. As in the case of other educational technologies, the perception of students is a determinant factor of whether weblogs are used in a way that elicits educational values. This paper investigates student perception towards the purposes of blogging. It reports an experience of introducing blogging tasks to third year computing students, and compares their perception with students not participating in the blogging tasks. A student perception model is proposed to explain the difference in the perception due to the experience in blogging. The paper concludes that mandatory use of weblogs in a course can gradually cultivate educationally sound perceptions in students despite of the observed misuse.