The purpose of this study is to conduct a multicenter, randomized effectiveness trial of The 3Ms 2.0 compared to an educational control condition for improving adolescent glycemic control and diabetes-related family relationships and reducing primary caregiver diabetes-related distress among Black adolescents with type 1 diabetes (T1D) and their primary caregivers. The proposed study would develop and test The 3Ms 2.0 adapted intervention when delivered using a mobile health approach (accessed via parents' cell phone). The intervention will also include new family intervention content (videoclips and text messages).