Weaver’s teaching ranges over the ancient and medieval church, with particular attention to the church of late antiquity in the west. She is presently engaged in study of the lives of early medieval female saints as a form of biblical interpretation. She is an ordained minister in the Presbyterian Church (U.S.A.). She is the author of Divine Grace and Human Agency: A Study of the Semi-Pelagian Controversy and is an associate editor for the New Westminster Dictionary of Church History.