The author of this paper as a teacher of mathematics shares her views on mathematics teaching based on her professional experiences over many years. In this paper the author mainly focuses on how teachers create opportunity for pupils to engage with mathematics seriously and enjoyably. Being a good teacher and teaching mathematics successfully is not easy process and task. From a constructivist perspective the author as a teacher of mathematics and mathematics educator suggests that the question of “how we teach” should be central to a process of being good teachers and developing teaching.