The ONE Step program offers training and practical application exercises designed to empower Early Childhood Educators and organizations serving low-income status parents/caregivers with the information and resources they need to help protect young children’s health from exposure to secondhand smoke, secondhand marijuana smoke, thirdhand smoke, and vaping aerosol. Updated content includes the latest research on the negative health, mental/cognitive, and academic impacts of exposure to secondhand smoke and aerosols; asthma basics and ways to manage asthma are included.