Abstract :
Education has a central role in the development of development and one aspect
of improving human resources. Problems that still exist in the world of education are the
low ability of students to solve a problem, especially on biology subjects, so that it
requires an action that can overcome these problems, one of them is by changing the
learning process better. The purpose of this study was to determine the effect of the
Application of Group Investigation (GI) Learning on Problem-solving Ability of Class X
MA Rhabitussa’adah Students in the Academic Year 2018/2019. This type of research is
experimental research using Quasi Experimental Design. The population in this study
class X students in semester II consisted of 2 classes with a total of 37 students. The
sample in this study was class X IPA as the experimental class and class X IPS as the
control class using simple random sampling technique. The instruments in this study were
in the form of tests in the form of essay tests totaling 8 items. Based on the results of data
analysis, the average value of the experimental class posttest was 74.2 and the control
class was 66.17. While the hypothesis testing using statistical analysis with the t-test
formula on the confidence level of 5% is obtained tcount of 3.418. After comparing with
table 1,690, then tcount 3,418> t table 1,690, so that the conclusion in this study is that
there is an effect of the Application of Group Investigation (GI) Learning on the Ability
to Solve Problems in Class X MA Rhabitussa’adah Academic Year 2018/2019.
Keywords: Group Investigation (GI), Problem Solving Ability