The purpose of this program evaluation is to examine the effectiveness of one Communities in Schools (CIS) program within a Title 1 Suburban High School in the Southeastern United States. The areas of foci include student attendance, grade level promotion, and graduation rate during the 2016-2017 school year. The program evaluation was designed to answer the following evaluation questions identified by stakeholders based on the current academic and graduation goals of the Southeastern Title 1 Suburban High School: (1) To what extent does participation in the CIS program impact at-risk students' attendance? (2) To what extent does participation in the CIS program impact at-risk students' grade-level promotion? (3) To what extent does participation in the CIS program impact at-risk students' graduation rate? This program evaluation utilized an objectives-oriented evaluation approach. The findings indicated that the CIS program is effective in helping at-risk high school students succeed. However, the CIS program may benefit from additional site coordinators, improvement of data collections, and an additional student recruitment category. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]