The C.A.S. School was founded by Sami Mustafa in 1981. Within its first few years it had established itself as a leading private school in Karachi.

In January 2005 the Junior and Senior Sections shifted from rented (residential) premises to the present custom-built Main Campus. A diversified Programme of Studies could now be offered on a more expanded and elaborate scale for students to experience a wider intellectual canvas and learning opportunities. The Kindergarten Section moved into its purpose-built campus, located behind the Main Campus, in January 2009.

Today, the C.A.S. offers a 14-year programme from Playgroup to O-Level, with a total of 1,250 students, 205 teaching members and 80 support staff in the two campuses.