What is the fine-grained topic of the following text: CSDC worked closely with Carpe Diem Collegiate High School to select the ideal location for its first replication school in the State of Indiana, as well as in the creation of an economic and efficient site design to support the school’s state-of-the-art, blended education model. Only return the topic.
The establishment of Carpe Diem Collegiate High School's first replication school in Indiana.