Regional School Unit 21 (RSU 21) is a school district located in Maine, serving the communities of Kennebunk, Kennebunkport, and Arundel. It provides education for students from pre-kindergarten through grade 12, focusing on academic excellence and personal growth. The district operates several schools, including Kennebunk High School and Kennebunk Elementary School. RSU 21 emphasizes a collaborative approach to education, involving parents, teachers, and the community. The district offers various programs and services to support student learning, including special education and extracurricular activities. Its mission is to prepare students for success in a rapidly changing world.