A mathematics teacher must have several key qualities to be effective. They must have a strong interest and positive attitude towards mathematics to fully understand the subject matter. They must also understand individual differences in students and how to identify where students are struggling. An effective math teacher presents the material in a clear and skillful manner, inspires students to practice, and motivates them to engage in problem solving and mathematical discourse. Professional development programs help mathematics teachers stay updated on the latest research and teaching models to improve their instructional skills and better address the needs of their students.