LEO is annual event hosted by student council of SMAN 15 Surabaya and it's called by Libels. This event is for Junior High School students. The main purpose is to introduce libels to them and train the Junior High School students to compete and being capable with the hard questions."What makes LEO different from other Senior High School's Olympic is they put a game at each stage of it. For example is on English subject , there is held a game the students must look for words in some place at Libels area," Said Yoyon. This is one of the way that makes the olympic fun and memorable.And to make it even more fun, the students that participating in LEO will get some merchandises. They are memopad,pin,and totebag. Beside that,in every subject the question is varying . Some of them are easy and some of them are hard to solve. And the subjects tested at LEO are Mathematics,Science,English,and General Science.