Keystone International Schools were created by a group of experienced founders whose vision was to provide a holistic learning environment for students from around the globe. Keystone Schools offer: * Playgroup, * Preschool, * Mixed preschool age group in German, * Mixed preschool age group in French, * Kindergarten, * Primary School, * Middle School, * High School. Keystone International Schools have adopted the American Common Core State Standards, which are a set of clear goals for each grade level. These standards define the knowledge and skills students should obtain within their K-12 education. The standards are building blocks for successful classrooms which recognize that teachers and schools need to decide on an appropriate curriculum.