Правильно ли будет выбранное слово ? (вопрос на задаю на англйском)

First, my class graduates this year. Then the question is: If my class' graduation is going to be the 101st at our school (which is 101 years old), may I say anyhow that the class is going to be the school's 101st "ISSUE" ? Thanks in advance : )

But if the word "issue" isn't the right one, which word could be used to describe my class? Provided that the word is short....