In this research, the effect of project based learning on the science process skills of prospective
teachers has been studied. In the research, the experimental model with an end test control group was
used. The sampling was created by the prospective teachers of the second grade at Science Teaching
Department of Uludag University. In the study, two assessment instruments were used one of which
was the Science Process Skills Assessment Instrument - I consisted of 29 open ended questions 11 of
which were multiple choice questions of science process skills, and the other one was Project
Presentations Assessment Instrument Chart consisted of 21 items which was used to assess the
resulted projects of the participants in the experimental group. The data gained were compared in
Mann-Whitney U and t-tests in independent groups. It has been seen that the grading means gained
from science process skills of making observation, designing experiments and deductions of
experimental group were higher compared to that of control group, but the standard deviation grades
were lower in the science process skills of making observation, designing experiments, assessment,
numerical and spatial association, recording data and deduction. Herewith, it has been concluded that
the project based learning method was effective on those process skills of the experimental group.