From having to leave her cowgirl hat at home to being seated between the rambunctious "J-twins," a brand new day in a brand new class is not going Nellie Sue's way, especially with her best friend, Anna, being nice to new girl Maya.
Carlos would rather stay in kindergarten and states he will only go to first grade one day; but when Miss Popper reveals that someone new will be arriving on the second day of school, Carlos decides to return.