Schools are ecological assets that contribute to positive youth development. Anchored on the positive youth development (PYD) perspective, Gomez and Ang (2007) proposed that schools can promote the five Cs of PYD if the following components are present: positive people, positive places, and positive opportunities. The study sought to develop and validate a scale that would assess the extent to which schools are perceived to be promoting PYD among adolescents. The proposed 30-item Positive Schools Scale was pretested to a sample of 496 adolescents aged 13 to 21 from two private high schools and two private universities in the Philippines. The reliability of the scale was established using Cronbach’s alpha. The structural validity of the scale was also confirmed using confirmatory factor analysis, while external validity was established by modeling the relationship between the Positive Schools Scale and existing measures of the five Cs of PYD.