It is not known how teachers describe parental involvement as an influence on Mexican immigrant student achievement is the problem of this study. The purpose of this qualitative descriptive study is to explore how teachers describe parental involvement as an influence on Mexican immigrant student achievement in Northern Illinois. The six types of parental involvement theory of Joyce I. Epstein, which include parenting, communicating, volunteering, learning at home, decision-making, and collaborating with the community is the theoretical framework used in this study. The research question of this study is How do teachers describe parental involvement as an influence on Mexican immigrant student achievement? The sample of this study is 27 teachers of Mexican immigrant students in a school district in Northern Illinois. Data in this study was collected using one-on-one interviews and a focus group. Data were analyzed using Braun and Clarke's thematic analysis procedure. Data analysis of this study produced 10 themes discussed in chapters 4 and 5, like parental involvement, barriers to involvement, and student achievement. Among the most important findings, the barriers for Mexican immigrants that prevent them from being involved in their children's education are language, feeling unwelcomed, and lack of knowledge of the U.S. education system, among others. This study suggests culturally responsive teaching and professional development for teachers and staff to understand Mexican immigrant culture and practices to increase student achievement. This study contributes valuable information and recommendations to teachers and staff in Northern Illinois school districts and other states in which the Mexican immigrant population is rapidly increasing. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]