This book whose content is derived from a research study entitled "Preschool Teachers' Pedagogical Content Knowledge of Mathematics: A Case of Selected Schools in Lusaka Province of Zambia", has been written to support mathematical knowledge for teaching in mathematics in order to improve teaching resources in preschools. It highlights teachers conducts that address barriers to initiate fostering or inhibiting learning in development of the child's mental processes. It also highlights techniques which aims at identifying various factors that are important in teaching of mathematics to children. This book further reveals various factors that are important in teaching mathematics to children from a teachers' perspective. The purpose of this book is to create awareness on the factors that foster learning of mathematics in order to enhance the level of pedagogical content knowledge and activities used in the teaching of mathematics by Zambian preschool teachers.