All schools are different.
The membership of ISAS consists of 78 schools located in Arizona, Kansas, Louisiana, Mexico, New Mexico, Oklahoma and Texas enrolling over 44,000 students. A central purpose of ISAS is to encourage, support and develop the highest standards for independent schools of the region and to recognize by formal accreditation those schools in which these standards are maintained. Membership in the Association carries with it ISAS accreditation. No school may be a member of ISAS without submitting itself to the demanding ISAS accreditation process. Each member must provide the Association documentation of the school's adherence to the ISAS Standards for Membership.