one planet international school is located in addis ababa, ethiopia. at the kindergarten level, it offers lower kindergarten (age 3-4), upper kindergarten (age 4-5), and preparatory (age 5-6). at the primary level, grades one through eight are offered. at the secondary level, grades nine and ten are offered. grade 11 and 12 will be added in 2016 and 2017 respectively.