It's not required that your child go to kindergarten but they are required, when they are old enough, to go to first grade.

不要求您的孩子上幼儿园，但当他们足够大时，他们必须上一年级。

In the U.S. nowadays, it's required that you go to school until the age of 16 in most states, but it isn't required that you graduate from high school, although most people do.

现在在美国，大多数州都要求你上学到 16 岁， 但并不要求你从高中毕业， 尽管大多数人都这样做。