Wisconsin: Oregon Preschool Incorporated Oregon Preschool, Inc. (OPI) is a licensed, parent cooperative preschool for three to five year olds. It is a non-profit, non-discriminatory, non-sectarian school. Our parent cooperative preschool is organized and administered by parents, creating a wonderful opportunity for involvement in the classroom and OPI activities. Because of the responsibilities carried out by parents, tuition can be held at a reasonable level. Being part of a parent cooperative preschool is a great way to begin involvement in your child's school years.