Attendance at kindergarten in the US is based on age requirements that vary state to state. Each state has a cut-off date for a child's birthday in order to enter kindergarten. Each state also has a different age for compulsory attendance which is the age a child must be either enrolled in school or declared as homeschooling. You can check your state's cut off date and compulsory attendance age per the Department of Education.There is no academic requirement or assessment a child must pass to enter kindergarten.