At my school the students are separated by "classes". About 30 students belong to each class and they take all their classes together. In America we classify them by the year that they are in school. For example, 8th grade, 9th grade, 10th grade, etc and every single student in that year belong to the same class. In the Czech Republic they are divided even among the same year. Seniors at my school here in the Czech Republic there is 4C, 4D,4B, 6A, and V8G. Kids in those classes would all be considered seniors in America but here they are identified by their class.
Last night I went to my final ball. Each class has a Maturita Ball. The kids in the class have a theme and they organize the ball themselves. It was 4C's turn last night. The 30 students looked beautiful in their gowns and suits and their theme was commercials. The ball was held at a local hotel and all family, friends, and teachers are invited.
Students from the younger classes also come to the balls to support their friends. The students on the left are some of my third year students. The students on the right are two of my 4D students. Their English is amazing and I am proud to be their teacher :)
Their gowns are beautiful and they all shined.