Mathematical identity is a socio-motivational construct known to be a predictor of mathematical achievement. Students who identify positively with mathematics are more likely to pursue advanced courses and Science, Technology, Engineering, and Mathematics (STEM)-related occupations. Although mathematical identity is shaped by a myriad of internal and external factors on both a small and large scale, educators play a significant role in the formation of their students' mathematical identities. This paper presents an overview of research and theory regarding those pedagogical practices for teaching mathematics that can foster the formation of positive mathematical identities.