This book is an effort by two people whose point of convergence is the need to rekindle Catholic education and its pivot which is 'the human person'. The book: The Mission of a Teacher in a Catholic school is not only intended for classroom teachers, but also the immediate Catholic school leadership, School Chaplains and other Priests responsible for Catholic schools, School Board of Governors, Parents and Diocesan Education Secretaries or any person with an aim of educating children in a Catholic school. It is a reflection and discussion on 'what ought to be the theory and practice of Catholic Education and its implicit and explicit challenges. The two authors base their argumentations and ideas on their academic, social and professional background. John Mary Vianney has been a Teacher of Christian Religious Education, Bible, and Economics and with a lot of experience in Management of Catholic schools, he is currently the Principal at Luigi Giussani Institute of Higher Education where he also teaches Philosophy of Education, Teachers' Professional ethics, and Education leadership and Management, while Anthony Mugagga is an Associate Professor of Philosophy of Education and Teachers' Professional Ethics at the College of Education and External Studies Makerere University. He is also a visiting Professor at Kisubi Brothers' University Kampala Uganda a Constituent College of Uganda Martyrs University Nkozi. John Mary Vianney and Anthony Mugagga are former-seminarians and well rooted in Catholic faith and tradition. They both share a passion for responding to the 'Masters' command to his disciples and to his Church: "Go ... make disciples' (cf. Mt 28:18-26). This, they feel, is not only a duty for the clergy but even the lay teacher in the school can help in fulfilling of this imperative. John Mary Vianney and Anthony Mugagga wish to thank the different schools and Universities, their students and fellow teachers from whom inspirations, reflections and discussions of Catholic education emanated. They also wish to thank the graduate students of Walsh University Kisubi Brothers University College 2010/2011, the staff and students of Makerere University School of Education, Luigi Giussani Institute of Higher Education, St. Kizito Secondary School, Bugolobi, and those of Namugongo Uganda Martyrs Senior Secondary school. These were very pivotal in informing and underpinning the discussions on Catholic Education in Africa. John Mary Vianney and Anthony Mugagga are also thankful to Rev. Fr. Dr Ggenza Gyavilla Musoke of Masaka Catholic Diocese for the critiques and discussions on Catholic education in Uganda. Special thanks also go to Fr. Dr Peter Kanyandago of Uganda Martyrs University, Uganda for proof reading the manuscript and giving his enriching comments. John Mary Vianney and Anthony Mugagga accept the fact that, St Ignatius of Loyola was able to do all he did because he had control over education in Europe (Betrand Russel 1966: p. 509-511). They pray that in using this book, Catholic education stakeholders will always bear in mind the Master's saying and warning found in Mt 5:13: ' You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled underfoot.