United 2 Serve aims to implement in-school programs for substance users to help rehabilitate and reintegrate them into society effectively. Their vision is to create global impact and provide opportunities for teens struggling with substance use. Their plan includes researching programs, creating a presentation, contacting agencies and schools, applying for grants, determining staffing needs, setting up the program, and recruiting and reintegrating students into healthy lives. Common substances affecting teens include drugs, medication, and alcohol, which can impact academic achievement, mental health, and risk of addiction when abused.