God's reign is about His authority to rule while His realm speaks to the "where" of His Kingdom. Jesus’ presence on earth served as a physical embodiment of the arrival of God’s Kingdom. His healings and miracles were small samples of God’s Kingdom goodness breaking through our sinful, fallen world. His death and resurrection signaled a new order, a defeat of sin’s curse that is at work in our world and a preview of the eternal life that awaits all Believers at Christ’s return.
God’s Kingdom, one of the studies in the Activate line of Bible study curriculum, will help your students interject aspects of God's Kingdom into the world around them, each day. And this has a powerful effect. It literally serves to draw others to God, in turn, welcoming them into God's Kingdom.