This study aimed to investigate the effect of science teaching, based on the Common Knowledge Construction Model (CKCM), on cognitive and psychomotor learning in 7th -grade students. The study group consisted of 29 students from two public schools affiliated with the Ministry of National Education in the 2018-2019 academic year. The study was carried out following a semi-experimental pre-test post-test control group research design. The data were collected with a "Scientific Inquiry Skills Test," and a "Psychomotor Skills Rubric" (PSR) developed by the researchers. The PSR was used to evaluate the practice exam results of both groups. Data were analyzed with a standard statistics package. It was determined that the scientific inquiry skills post-test scores of the experimental group (X=15.87) were higher than the control group (X=10.92). The difference was observed to be significant. Also, a comparison of the total post-test PSR scores showed a statistically significant difference between the experimental (X=15.44) and control groups (X=13.30).