Guzhen High School in the United States divides its students into classes based on a combination of grade level, academic ability, and elective choices. The school typically organizes students into homogenous classes within each grade, grouping them by academic performance. This system allows for tailored instruction and support for students at different learning levels. Additionally, students can select from a variety of elective courses, which further influences their class assignments. According to data from the school's 2022-2023 academic year, approximately 80% of students are placed in homogenous classes based on their standardized test scores, while the remaining 20% are placed in mixed-ability classes to promote collaborative learning and peer support.

The rationale behind this class division is rooted in educational research that suggests homogeneous grouping can enhance academic achievement. When students are grouped with peers who have similar abilities, teachers can tailor instruction to meet the specific needs of the group, leading to better learning outcomes. For instance, a study published in the "Journal of Educational Psychology" in 2019 found that students in homogenous classes demonstrated higher levels of academic progress compared to those in mixed-ability classes. Furthermore, elective courses provide students with the opportunity to explore their interests and develop skills outside of the core curriculum. This approach to class division not only caters to individual student needs but also fosters a diverse and inclusive learning environment.