The aim of this research was to find out the effectiveness of
Demonstration technique for teaching vocabulary at the first grade students in one
of State Junior High Schools in Sokaraja, academic year 2012/2013. This research
used quasi experimental research that the population was the first grade students.
The total sample of the research was 72 students and the samples were VII-H as
experimental class and VII-I as control class which consisted of 36 students for
each classes. The use of Demonstration technique of treatment was used in the
experimental class, while in the control class the treatment was conducted in
conventional ways. Test was used in collecting the data of this research, namely
pre- test and post- test. The test consisted of multiple choice items, matching
sentences with the pictures, and completions. Based on the computation, t- test
result was 3. 5172, and the result of t- table at the significance level 0.05 with the
degree of freedom 70 was 1. 6669. Then the calculation of t- obtained with t- table
was concluded that t- obtained was higher than t- table (3.5172 > 1.6669). Based
on the post- test result, it also could be seen that vocabulary meaning and spelling
aspects were significant less than 0.005. After doing treatment in experimental
class, there were better result both vocabulary meaning and spelling. In
vocabulary meaning aspect, the students could know and mention the name of the
things in their everyday usage in English. Besides that, in vocabulary spelling
aspect the students also could differentiate between how to speak and write the
words as the good effect doing demonstration activities.
Based on the description mentioned previously, it could be concluded
that Demonstration technique was effective for teaching English vocabulary at the
first grade students in one of State Junior High Schools in Sokaraja, academic
year 2012/ 2013.