The purpose of this research are: 1) to develop problem-based learning model (PBM) in biology subjects
to improve the prospective teacher in applying inquiry; and 2) to obtain the expert assessment of the accuracy
of the PBM model developed. This research is the development (research and development) by using a systems
instructional design approach. PBM model is developed based on a needs analysis biology teacher competence,
and the review of the literature regarding the characteristics and process of problem-based learning. The result
PBM model development is validated by two experts biology use instruments such as scale ratings on five
aspects of the learning model of the structure (syntax), the social system, the role of the studyr, support system,
and instructional impact. Data evaluation from expert is analyzed by descriptively. The early stage of this
development is created PBM model on three subjects biology, namely biology Learning Strategies, I PPL and
PPL II to improve prospective teacher in applying inquiry. PBM model structure on the three subject consists of
three stages: problem identification, planning, problem solving, implementation of problem solving, presentation
of the results of troubleshooting and problem solving reflection. The fifth stages of the PBM model implemented
in several cycles repeatedly solving during one semester. The expert assesses PBM model that is developed
accordance with the characteristics of problem based learning and its good to enhance the competence of
prospective teacher in applying inquiry.