An effective mathematics teacher is a reflective practitioner who engages in continuous self-evaluation and analysis of their teaching practices in order to improve. Reflective practice involves deliberately reflecting on one's experiences to gain new understandings and inform future lessons. There are various reflective strategies teachers can use, such as keeping a teaching journal, collaborating with peers, and using student assessments to critically examine their practices. Being a reflective practitioner helps teachers develop deeper understanding, identify their strengths and areas for growth, and enhance their teaching skills.