School System in Panem

So, in the books, we know very little about the schooling system in the districts except for rough ideas of certain activities and class discussions. I can’t remember if it says in the book if they have Reaping Day off of school or if it is summer break. In TBOSAS, Snow attends school at the academy during the summer, which implies that he normally does so. Also, when Lucy Gray is in the zoo and the children come up to her, Snow thinks about why the children aren’t in school. Furthermore in SOTR, Proserpina and Vitus both have a school assignment from the university to make over the tributes. Does all of this mean there is no summer vacation from school in Panem?