摘要：This study aimed to describe the collegiality leadership of teachers in mathematics learning in class XI SMK Country 2 Surakarta School Year 2017/2018. This type of research is qualitative research . The subjects of the recipient of the action were students of class XI SMK Country 2 Surakarta 3 classes, namely XI TPM D, XI TKBB, XI TKR A which amounted to 90 students and the subject of the action was the researcher assisted by a mathematics teacher. Method of collecting data through observation, interviews, field notes and documentation. Data analysis techniques were carried out descriptively qualitative with a flow model consisting of date collection, data reduction, data presentation, verification and conclusion drawing. The results of this study indicate that by approaching sis w a private, invite students to dialogue about the future and the dreams that you want, recognize family background da n neighborhood, invite students to improve themselves through faith and piety in synergy den gan science and provides a communication medium in the form g rup online social media to enable students both inside and outside the school can be productive communication so that students succeed in education and future.
