By Jennifer Johnson You may know Exponential as the premier conference for church planting, but you may not know that a similar event exists for leaders focused on discipleship””and that some of the same people are behind both. Todd Wilson, founder and director of Exponential, and Bobby Harrington, lead pastor at Harpeth Christian Church in Franklin, TN, launched the National Disciple Making Forum in 2014 at Saddleback Church in Southern California as a way for disciple-making leaders around the country to learn, pray, worship, and grow together. “I wasn”t sure if I wanted to take this on, honestly,” Harrington says.