Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>This study aims to examine the effect of Project Based Learning (PjBL) based on a process skills approach to students’ creative thinking skills. This study uses a one-shot case study design. Research subjects were students of class X SMA N 1 Kalasan, Sleman with a total of 48 students. The selection of research subjects was done by simple random sampling. Data is collected from the results of the work done by students. Data analysis was carried out by descriptive analysis and inferential analysis. The results of the descriptive analysis presented are the average value, standard error, standard deviation, minimum value, maximum value, and percentage of the achievement of each indicator of creative thinking skills. Descriptive analysis on the influence of creative thinking skills is done by analyzing each indicator on the ability to think creatively. The results obtained from the descriptive analysis showed that the achievement values on the indicators of Flexibility, Fluency, Elaboration and Originality showed the results of 31%, 26%, 24% and 19% respectively. In inferential analysis is done by analyzing normality and hypothesis testing with one sample t-test. In the normality test obtained by result of Ho which shows that there is influence of creative thinking skills after using learning with the PjBL model based on process skills approach.</jats:p>