THE EFFECT OF IMPLEMENTATION GROUP WORK TOWARD STUDENTS’ SPEAKING ABILITY Miftahul Khaira 1 , Merry Prima Dewi 2 , Hilma Pami Putri 3 , Widya Syafitri 4 1 State Islamic University of Sjech D.Djamil Djambek Bukittinggi Email : miftahulkhaira2000@gmail.com 2 State Islamic University of Sjech D.Djamil Djambek Bukittinggi Email : merryprimadewi@gmail.com 3 State Islamic University of Sjech D.Djamil Djambek Bukittinggi Email: hilma.pami.putri@iainbukittinggi.ac.id 4 State Islamic University of Sjech D.Djamil Djambek Bukittinggi Email: widyasyafitri260780@gmail.com ABSTRACT Speaking is a fundamental English Ability for everyone, particularly for the students. Speaking as a medium of communication allows you to exchange information, thoughts, and feelings with others. Otherwise, a speaking skill of students are relatively low. It raised an idea to conduct the teaching of speaking through the application of group work to assist learners with improving their speaking ability. The design of this research was quantitative method with quasii experimental design by comparing two classes. Thee collecting of data was pre- and post-test. It was control class by 37 students and experimental class by 36 students. The data revealed that group work had a significant influence on student involvement and speaking skills. It was revealed that the t-calculated (8.335) was more than the t-table(1.994). Next, there were significant differences in students' ability in speaking between those who were taught applying group work and thoes who were not. It was plainly indicated by the fact that the t-calculated value was bigger than the t-table value (5.627 > 1.993. At last, students who are taught through group work had better speaking abilities than students who are not taught by way of group work improvement in the mean score of the experimental class was clearly greater than the improvement in the mean score of the control class (18,12 > 8,17). Key Words: Group Work, Speaking Ability