The aim of this article is to propose a method which is to use the WhatsApp social media tool, as one of the teaching and learning strategies for the purpose of active, engaging and interaction among students and teachers in a course in the Hail University (UoH), Kingdom of Saudi Arabia (KSA). The scope of this article is not only limited to enhance interaction with students in a classroom, but also to discover the effectiveness of this new technique outside the classroom as an additional guide. This article also finds that the method has two types of direct impacts both in classroom engagement and utilization outside the classroom, among students and instructor. The proposed method is initially implemented with 13 closed end survey questionnaires among 75 Computer Science & Engineering students based on the view of students use and availability of social media usage. T-test sample-based methods are used to measure the performance of the proposed hypothesis and the result indicates that WhatsApp is one the best possible effective tools for enhancing interaction among students and teachers.