My Father and Mother one Earth and in Heaven is the 1st grade textbook in the Our Holy Faith series. It is an age-appropriate introduction to the basic beliefs of our Catholic faith. As the majority of instruction at this level is intended to be presented orally, the Teacher's manual is indispensable to the teaching of the First Grade coursework and is strongly recommended. Our Holy Faith is a series of religion textbooks produced in the late 1950s, based on the Baltimore Catechism. Each grade level is well-written for its intended age group and is thorough and orthodox in its presentation of the faith. These texts have stood the test of time and are still being used by families today. Now this series can be purchased in economical softcover versions, or more durable hardcovers--depending on your family's budget!