The research is entitled “The Effectiveness of Jigsaw Technique in English
Speaking Skill. The purposes of this research is to find out the effectiveness of
using jigsaw technique in English skill. This research belongs to experimental
research and quasi experimental design. It describes about a study that cast about
the effect of giving treatment of using jigsaw technique in 11th grades students’
speaking skill to an experimental group. The test result of post-test in
experimental class showed that the students’ average is 65.68. The result of this
study showed that the students in experiment group got better development in the
average scores than the control group in speaking test. The differences of the
development of the average scores is statistically significant at the (0.05) alpha
level of significance. It was found that there was significant difference for those
who were taught using jigsaw technique and those without it. The difference is
shown by the development of the average scores. The group that used jigsaw
technique as medium in jigsaw got better improvement in the average scores
(76.14) than those without jigsaw (51.08).