The flipped classroom model was used in teaching the clinical practice skills of the students in the experimental group. First of all, videos for clinical applications were prepared by the researchers. These prepared videos were shared with the students in the experimental group one week before the lesson day of each application for preliminary study and the students were asked to work on these videos. On the day of the lesson, group work, question-answer and discussion activities were held with the students in the classroom environment. At the end of the lesson, the students were asked to do the applications on the simulation models of the application and the checklists were filled.

To the students in the control group, the application was explained by the researcher (instructor conducting the course) using presentation and demonstration methods. Each application was made on different days. The prepared checklists were filled by the other researcher. While the students were doing the applications, one of the researchers observed the application and marked only the skill level in the checklists ("applied", "incompletely applied" and "did not apply") without making any comments or directions.

Videos for clinical applications have been prepared by researchers. These prepared videos were shared with the students in the experimental group one week before the lesson day of each application for preliminary study and the students were asked to work on these videos. On the day of the lesson, group work, question-answer and discussion activities were held with the students in the classroom environment. At the end of the lesson, the students were asked to do the applications on the simulation models of the application and the checklists were filled.

The checklists were created by the researchers using the clinical practice guidelines on nursing principles (Dikmen & Akın Korhan, 2016; Taşçı, et al., 2018) and the opinions of three experts in the field of nursing principles were obtained. In the study, intravenous catheterization (28 application steps), intravenous blood collection (24 application steps), blood pressure measurement from the brachial artery (24 application steps), intramuscular injection into the ventrogluteal region (34 application steps) and female urinary catheterization (39 application steps) applications were examined. 5 checklists containing skill steps were used. In the checklists, each application step was arranged as a three-point Likert scale as "applied" (2 points), "applied incompletely" (1 point), and "did not apply" (0 points). The lowest score in the checklists is 0, and the highest score differs according to the number of skill steps in clinical applications.