To ensure program fidelity, program educators will complete implementation checklists, and 20% of the sessions will be attended by an additional grant staff member to conduct implementation observations and assess participant engagement. Detailed records of participant attendance will be collected to assess dosage effects and attrition. All assessments will be conducted by grant project staff blind to the group status of the participants. Retention of participants will be maximized using strategies such as obtaining multiple phone numbers for each family; obtaining external contact information for siblings and close friends; sending interim reminders with the goal of fostering contact should the family move; and phone calls or emails every month to each family.