Abstract:
Abstract
The learning process is required to use a learning model that reinforces the scientific method in order to facilitate students in achieving various important skills one of which is critical thinking skills. Therefore, a learning device is required in accordance with the learning. This research was aimed to describe validity of science learning devices developed namely science learning device in junior high school guided inquiry base in trained students' critical thinking skills. This development research uses development phase by Plomp and Nieveen. Based on the results of research, learning devices have been valid so that it can be used in learning process. Keywords: validity, development research, learning device, inquiry.
