Friends School的高中校园（11和12年级）被称为Clemes（读作“ Cleems”），以该校的创始校长Samuel Clemes（1887年至1900年）命名。克莱姆斯位于学校的亚皆老街校区，有近330名学生。鼓励克莱姆斯大学的学生参加一系列的课外活动和服务活动。克莱姆斯（Clemes）的教牧服务集中于19个由11年级和12年级学生混合组成的小型导师小组。导师会在全天候的Friends’期间为学生提供支持，对他们的教育进度以及任何影响其学校生活和学术发展的问题进行概述。在Clemes，
At The Friends’ School, we aim to develop capable learners and confident young adults who are able to think critically, make decisions for themselves and act with integrity.Students have access to a varied curriculum and as they progress through their years of secondary education, they are able to tailor their studies to suit their individual interests and passions.Students are able to participate in a wide range of co-curricular activities including a variety of sports (including rowing, sailing, equestrian, soccer, hockey and basketball), music and dramatic arts (including dance, musicals and individual and group musical tuition), service-related endeavours (button selling, Amnesty letter writing, working with the Southern Support School) and academic pursuits including the Da Vinci Decathlon, Mathematics Challenge and debating.In these vital years, students are encouraged to take advantage of the many opportunities they have available to them and to create a balanced and rich schooling life.