JOURNAL OF INFORMATION SYSTEMS RESEARCH AND INNOVATION http://seminar.utmspace.edu.my/jisri/ ISSN: 2289-1358 Page | 10 Shamila Sohaei 1 email: soha.shamila@gmail.com Noorminshah A. Iahad 2 email: minshah@utm.my The emergence of social network sites has revolutionized communication tools for facilitating teaching and learning activities. There is little research regarding the adoption of SNSs in teaching and learning activities. In this paper the wide range definitions of social network that van be categorized as informal and formal social network sites in educational system and different models of social networks sites in higher education is reviewed. Also a comprehensive review of social network sites in which has been used in higher education based on their major goals is discussed. In addition some models that mostly are used for adoption of social network are review accordingly. Many studies have done on the effectiveness of social network sites as instruments of teaching and learning for perceived learning and its impact on ease of use of blended learning for instructors and students to figure out the SNS benefit in educational perspective. The main contribution of this paper is to find the gap of knowledge in adoption of social network sites in teaching and learning process in formal sites that can efficiency applied in educational system and provides direction for subsequences researches and as a guideline for future research in social network sites in education. ! " #$ %&’(% In recent years, social networking has become one of the most significant communication tools among people; in which exist through the Internet that provides accessibility for tremendous amount of people. Applying SNSs in teaching and learning offer a positive impact on the adoption of SNSs and open the door to the new days of learning and teaching. Social network mainly is focused on identity, network infrastructure, privacy concern, technological issues, and necessitation of its use as a tool for teaching and learning [19]; [21]. Research on SNS is still rather limited generally [23], and in academia in particular. However, the growing need of research on social networks and their utilization may assist account holders in using them more effectively. However, the growing need for research on social networks and their utilization may assist account holders in using them more effectively. However, the growing need for research on social networks and their utilization may assist account holders in using them more effectively. This essay goal is to review contribution of social network in blended learning and advantages for students and lecturers. In this essence, the classification and review is based on before and after adoption of social network among students and lecturers. The main achievement of this research is provide comprehensive review about social network site in education and figure out more opportunities for future improvement in this process. )$ *’* *+*, Generally, social network sites can be categorized into formal and informal category. Formal mostly is used education activity but Informal can be used for both educational and social. Social network are applications that sustain eagerness in spaces to share interest via common resources for sharing, communications, collaborations and having interactions. Providing aforementioned characteristics for educational social networks unquestionably can appropriately build learning environments in the academic world [30]. Defined Social networking sites as, “a webbased services that allow individuals to (1) construct a public or semipublic profile within a bounded system, (2) articulate a list of other users with whom they share a connection, and (3) view and traverse their list of connections and those made by others within the system. The nature and nomenclature of these connections may vary from site to site” [9]. The first Social Network Site (SNS) was launched in 1997. Beginning in 1998 used SixDegrees.com allows create a profile, list of friends and surfing the friends lists. Many of communities, from 1997 to 2001, SNSs began to support different range of profiles and publicly of friends. Using AsianAvenue, BlackPlanet, and MiGente permitted users to create a professional, personal, and dating profile. Users could recognize their friend’s personal profile without looking for approval