The aim of the study was to analyze step counts of middle school students in structured and unstructured physical education classes (PE) according to age, gender, and school type. Data were collected on a sample of 74 students, 40 7th and 34 8th grade students recruited from private and public middle schools. Omron HJ-112 pedometers were used in this study to obtain step counts. There were statistically significant differences between boys and girls in the step counts in both structured and unstructured PE. A significant difference was observed between school types in step counts during structured PE in both genders, while no significant difference was found for unstructured PE. Significant difference was found between step counts of only boys of different grades in unstructured PE. Boys made more steps than girls both in structured and unstructured PE. In structured PE, 7th grade boys reached a higher number of steps than 8th grade boys.