There is no “magic number” for kindergarten class size. And, in fact, since all children have their own unique set of needs, your child’s success in kindergarten is tied to a number of factors that may include class size, relationship with her teacher(s), the mix of children in the classroom among other factors. Different states, school districts and individual schools have different perspectives and regulations regarding class size. If you are concerned that the size of your daughter’s class is problematic, you might start by arranging to spend an hour or two in the classroom so you can observe how the teacher interacts with your child. If you are still concerned with the number of children in the class after spending some time in the classroom, set up a time to talk to the teacher or director of the school outside of class time. If you decide to look at other programs or schools with lower student-teacher ratios, be sure to inquire whether all teachers are in the classroom full-time since some schools may count staff (such as librarians) as teachers to drive down their student-teacher ratios.