A large body of research shows that physical activity helps school-aged children and adolescents improve their health and academic performance, and many different types of technology can be used to facilitate and promote physical activity within a school community. This study aimed to develop a valid and reliable questionnaire, titled the Comprehensive School Physical Activity Program Technology Practice Questionnaire (CSPAP-TPQ) that investigates the current practice of technology use for physical activity promotion among various school stakeholders. Two rounds of the Delphi method (n = 24 experts) were employed to determine the content validity of questionnaire items. Reliability was established using the test-retest method among 43 registered Active Schools Champions. The final version of the questionnaire encompasses 41 unique technologies with items related to respondent demographics, school characteristics, and technology experience. Expert consensus, percent agreement, and chi-square analyses suggest that the CSPAP-TPQ is a valid and reliable tool for examining technology use in school-based physical activity, which can positively impact not only students' health and well-being but also their academic achievement.