Middle & Upper School Activities


Before school begins each August, students are expected to attend a retreat. Middle school retreats are grade specific and provide an opportunity for students to connect with their Pride or advisory group, enjoy Pride competitions, and receive a fun orientation to school. Upper school students choose either a day or overnight retreat. These retreats are held off campus where team building and team challenges can occur within mix grade Prides. Past retreats included high ropes challenges, zip lines, lake obstacle courses, canoeing, and more.

CIS Spirit Week

In the fall and spring, members of Student Council organize a CIS Spirit Week. Each day of the week gives students an opportunity to dress up and show their CIS spirit.


The day before Thanksgiving Break marks the CIS Read-A-Thon. The school day is devoted to reading and reading-related activities, including local celebrity guest readers. In the middle and upper school, a theme for Read-a-Thon is chosen each year that provides unique and engaging activities for students as well as guest presenters.

Penguin Day

CIS joins with others around the globe in celebrating our formally attired feathered friends.

Be the Change Fundraisers

Students in upper school who participate in the Be the Change Volunteers trips organize several fun fundraisers, including a trivia night, rummage sale, and game nights.


Students in grades nine through twelve get the opportunity second semester to participate in a weeklong study of their interest. Faculty work in small groups to plan and organize unique sessions for students and students get to choose among three options each year. Students hear from community professionals, go on field trips, and study beyond the classroom walls. Examples of past intersessions include culinary arts, personal finance, bridges and engineering, forensic science, amazing race, and interior design/architecture.

Cultural Arts Day

Cultural Arts Day is a day in which we celebrate other cultures through a variety of arts-based activities.

Toga Day and Latin Skits

Toga Day is a tradition at CIS. Each spring, all of the Latin students come to school dressed in their formal toga attire. They have a special lunch together and then present skits (in English) based on the history and mythology they have learned about Greco-Roman culture.

Lip Sync Talent Show

Student Council hosts a talent show or lip sync contest, giving all middle and upper school students and faculty the opportunity to show off their talents, both serious and comical.

Faculty and Student Kickball Game

Each spring, students and teachers share their athletic talents by participating in a faculty versus student kickball tournament, followed by a social.

Senior Celebration

Senior Celebration is a senior-chosen activity to celebrate their time at CIS. The seniors plan the event and invite the juniors and guests. In addition, seniors plan a senior trip, along with faculty sponsors. Trips have included overnights to St. Louis or Kansas City, as well as a trip to Washington D.C.