Resumo. ABSTRACT The Programa Segundo Tempo (PST) designed theorethical and methodological standards in order to provide quality in sports education on national scale. The PST built an evaluation model to measure the compliance level of teachers to the PST pedagogical model. Thus, the objective of this study was to design the Class Observation Protocol (COP), as well as to establish its face and content validity. The following steps were followed in the instrument’s construction: a. review of the documents underlying the PST; B. meetings and consultations with the pedagogical teams; C. construction of the operational definition; d. construction of items; and. pilot study (Concordance Index between observers assessing the same class). In general, no differences were found between teams as to the relevance of the items and their weights. In addition, a pilot application presented a Concordance Index of 0.71 ± 0.22. Thus, the COP proved to be consistent and an excellent indicator to measure the PST’s teaching quality.