Age-grade placement is commonly used in primary education to determine the most appropriate class for a student based on their age.
年龄学级安排通常用于小学教育，以确定学生最合适的班级，基于他们的年龄。
The school implemented a new age-grade placement system to better align student learning with their developmental stages.
学校实施了一个新的年龄学级安排系统，以更好地将学生的学习与他们的发育阶段相结合。