The aim of the survey is to express the effects of social media tools on student‟s behavior.The research is a qualitative one designed with phenomenology method.The working group of the research consists of 25 branch teachers working in secondary schools in Bursa, Yıldırım district in the 2018-2019 academic year.Participants were selected by purposeful sampling method. A semi-structured interview form consisting of five questions prepared by the researchers was used to collect data in the study.In this context, teachers were asked what their opinions were on the effects of social media on student attitudes and behaviors, the effect of social media on students 'acquisition of bad habits, the effect of social media on students' expressing their thoughts freely, the effect of social media use on students 'academic achievement, and the effect of social media use on students' socialization. When the results of the research are investigated, 19 of the teachers participating in the research expressed that social media has a minus effect on student attitudes and behaviors, 5 have both positive and negative effects, also 1 have an assertive effect;24 of them stated that social media is effective in students' adopting poor habits, 1 of them has no effect;21 of them denoted that social media had an effect on students' expressing their thoughts freely, 4 of them had no effect;11 of them stated that the use of social media has a positive effect on the academic success of the student, 11 of them have a negative effect on academic success, 3 of them can have both positive and negative effects;11 of them stated that the use of social media has no effect on socialization of students, 8 of them stated that it has an effect, and 6 of them are undecided about this issue. Keywords: Social Media, Social Media Tools, Teacher, Student.
