Idaho Falls High School, commonly referred to as I.F., is a four-year public secondary school in central Idaho Falls, Idaho. The current building opened in 1952, though the school itself has been in operation for well over a century. Idaho Falls is the older of the two traditional high schools, the other is Skyline, in the Idaho Falls School District #91. The school colors are orange and black and its teams are the Tigers; the mascot is known as Teeger.