An Arlington County mother is asking the school board to revisit its potty policies after her 3-year-old daughter was suspended from preschool for having too many accidents. School officials removed Zoe Rosso from Arlington Public Schools' Montessori preschool at Claremont Elementary for a month -- or until she was better potty-trained, they told her mother. School policy is to remove a child who has eight accidents in a month, according to a spokeswoman for Arlington's Office of Early Childhood.