Guessing Meaning is one of the ways to make students easy to get the materials given by the teacher. It is to give a new strategy and to reduce boredom situation and make students interest in learning English vocabulary. This research, attempts to examine the effect of using guessing meaning on students’ vocabulary mastery.
The problem of this research is “is there any significant effect of guessing meaning on vocabulary mastery of the eight grade students’ at SMPN 4 Jember in the 2016/2017 academic year?”. The hypothesis of this research is a significant effect of guessing meaning on vocabulary mastery of the eight grade students’ at SMPN 4 Jember in the 2016/2017 academic year
The design of this research is randomized control group pretest posttest. The subject of the research is 72 students. There are two groups, 36 students for experimental group and 36 students for control group.
The research held on Oct 19th 2016 until Nov 9th 2016 at SMPN 4 Jember. After analysis the data, the result of this research shows the value of t test is 2.956 and t table value of degree of freedom 71 is 1.66660, t-test is higher than t-table, it means that the null hypothesis is rejected and the alternative hypothesis is accepted. So, it can be concluded that there is significant effect of Guessing Meaning on Students’ Vocabulary Mastery at SMPN 4 Jember in the 2016/2017 academic year.