The Child and Adolescent Mindfulness Measure (CAMM) is a frequently used measure of mindfulness in school settings. This study evaluates the psychometric properties and internal consistency of the CAMM in a predominantly African American, low socioeconomic status (SES) school sample drawn from students in kindergarten through fourth grade. In addition, a revised version of the CAMM (the CAMM-R) was developed and evaluated in the same sample. Results are generally supportive of the internal consistency and item-level characteristics of both the CAMM and the CAMM-R. These results are discussed in terms of implications for understanding the reliability and validity of the CAMM and CAMM-R among underrepresented students, as well as students within a younger sample.