Paper Title
The Implementation of Sociometry in Guided Discovery Learning Method of Grade 8 Students in SMPN 1 Lawang, Indonesia

The low of student group activity and thinking skill in mathematic problem solving make mathematic learning less ideal. Sosiometry in guided discovery learning method (GDL) can be used as solution of this problem. The aim of this research is to describe the implementation of sosiometry in GDL and problem solving skills in geometry flat side as a subject. Based on the purpose and participant indentification descriptive-quantitatif was the type of this research. Teacher and students activity data, sociogram and students problem solving skill were collected from observation, questionare and test. Keywords: Sociometry, Guided Discovery Learning Method, teacher activity, students activity and student problem solving skill.