The experimental design model with pre test-post test control group was
utilized in the study.
Sample
By taking the first term report scores of 165 8th grade students studying at the
one Primary School in the central district of Balıkesir during the 2011-2012
academic year into consideration, three equal classes have been included under
the scope of the study. Among these classes, 8-B was randomly selected as the
experiment, 8-C as the control, and 8-D as the pilot group and 105 students
constituted the study group.