Implementation of Lesson Study in Enhancing of Student Learning Activeness on the Discreet Mathematics Subject In Mathemathics Education Study Program of Ahmad Dahlan University.

The Learning that implemented by lecturers tend to use conventional method so that the result is student activeness e less. The aim of this article is to know theenhancing of student leaning activeness n discreet mathematics subject trough lesson study. In the observation of student learning activeness, technique collecting data used observation technique and the instrument was observation shet of students’ activeness. The participant of lesson study were students of mathematics education study program at class D of semester7 amount 56 students. This lesson study was implemented for 4 ycles with 4 meetin. The implementation of lesson study engaged all lecturers in mathematis education study programas model lecturer and the others as observers. Based on Analysis of observation sheet of student learning activeness was obtain that lesso study with problem based learning (PBL) implementationcan enhance the student learning activeness. It can be seen from the percentage of activeness on 1st cyle was 57.35% , 2nd cycle was 61.67%, 3rd cycle was 59.92% and the last cycle was 67.75%. This shown that the criteria of student learning activeness on each were in good critera