...Ekrem Cengiz The purpose of this study was to test the effectiveness of a course taught with worksheets on the subject of blood circulation. The study was conducted with students aged 12–13 in a single class at a public middle school. This worksheet has seven questions in total. At the end...

... beads and water to mimic solutions. Using these model solutions, students will understand the concepts of tonicity and osmolarity. The hands-on exercise is supplemented with a worksheet that reinforces the concepts they learned in doing the activity. This exercise has broad application with respect...