What teachers think about mathematical proof?

This paper presents a quantitative study, initial part of a larger work that also involves a qualitative component, which aims to study the conceptions of mathematics teachers in 5th to 9th grades (n=115) about mathematical proof. The results, that are based on the application of a questionnaire, show that teachers, despite their different academic backgrounds (all of them with a background in mathematics, but some performed courses with a strong pedagogical component and others with a predominant mathematical component), recognize the nature of proof and its importance in student learning, showing awareness of the need to adapt proof to students capabilities