This article describes the process of designing a questionnaire for primary school teachers in Chile, on the self-perception of evaluation skills. This work corresponds to the initial qualitative phase of a mix-method exploratory study, which began with a comprehensive literature review on the contributions of prominent authors and institutions on professional teaching skills, focusing specifically on those relating to the evaluation of students’ learning and the evaluation of their own teaching practices. From the theoretical review, four types of evaluation skills were determined (technical, methodological, participative and staff). These were complemented by the contributions of practising primary school teachers, collected in two focus groups. The instrument was validated by experts in evaluation and teaching skills, and then applied to a pilot sample of teachers, a process that allowed us to generate a valid and quality questionnaire for teachers to reflect and evaluate their evaluation skills.