Sri Lanka's education structure is divided into five parts: primary, junior secondary, senior secondary, collegiate, and tertiary. Primary education lasts five years (Grade 1 to Grade 5) and at the end of this period, the students may elect to write a national exam called the Scholarship exam. This exam allows students with exceptional skills to move on to better schools. After primary education, the junior secondary level (referred to as middle school in some schools) lasts for 4 years (Grades 6-9) followed by 2 years (Grades 10-11) of the senior secondary level which is the preparation for the General Certificate of Education (G.C.E) Ordinary Level (O/Ls).