If you have a mixed class with students in different grades, you can sign up the class as a mixed class (e.g. 3/4). Note that if you have a mixed class of students consisting of 1-2 graders and 3-4 graders, the class will be competing in the Junior Monkeys category. In addition, please note that you can't use class codes like 2-3 or 1-3. They prevent your class from showing up in the Hall of Fame.