Human Trafficking and Exploitation Prevention Training Act of 2019 This bill requires the Office on Trafficking in Persons (OTIP) within the Administration for Children and Families to award grants to nonprofits, state agencies, elementary and secondary schools for demonstration projects to train students, teachers, and school personnel how to better understand, recognize, prevent, and respond to human trafficking and the exploitation of children and youth. Such projects also must collect data about the number of human trafficking survivors served and develop procedures to coordinate with law enforcement and appropriate social service organizations. The OTIP must consult with the appropriate agencies to determine and prioritize funding for geographic areas with the highest prevalence of human trafficking and largest underserved youth populations.