Cheryl Erwin is a licensed marriage and family therapist with more than 25 years of experience in working with parents and children. She is the author or co-author of several books on parenting, including “Positive Discipline: the First Three Years,” “Positive Discipline for Preschoolers,” and “Positive Discipline for Single Parents.” Cheryl provides professional development training and workshops for teachers and early childhood educators, and is available for personal, online parent coaching.