Development and validation of integrated science students worksheet based on science process skills

This research was research and development which focuses to develop Student's worksheet based on science process skills. The development model of the research refered to 4-D model by Thiagrajan which was solved only until defining, design, and development stages. This research aims to find out: (1) Students worksheet based on science process skill in respiratory system to junior high school validity, (2) students worksheet based on science process skill in respiratory system to junior high school practicality, and (3) students worksheet based on science process skill in respiratory system effectiveness to improve student's science process skills. The product examination used one-group-pretest-posttest design and was held in 8th grade of SMPN 13 Makassar for second semester of academic year 2017/2018 with the number of subject was 29 students. The results showed that the instruments used fit the valid criteria, based on the student responses and science process skills tests are categorized as effective.