Inclusion Criteria:

• Children:
• * enrolled in 7th grade at the start of the study,
• * have a body mass index percentile of 85th or greater for age and gender,
• * not under medical care for OB or type 1 diabetes,
• * have reliable internet connection at home,
• * have access to a computer, laptop or tablet at home,
• * not expected to move from the participating county before the conclusion of the study.
• Parents:
• * read at a 5th grade-level,
• * speak English,
• * have a home-mailing address (not PO box),
• * have a working telephone number, and
• * are not expected to move from the participating county before study conclusion.
• High school peer mentors:
• * are in either 10th or 11th grade at the start of the recruitment,
• * reside in a targeted county,
• * interested in working with peers, supporting others, and striving to cultivate their own health-supportive behaviors,
• * have reliable internet connection at home,
• * have access to a computer, laptop or tablet at home,
• * are not expected to move before the intervention ends,
• * can speak English,
• * are recommended by a teacher, school advisor, or counselor.

Exclusion Criteria:

• Child:
• * not in 7th grade at the start of the study.
• * not able to read or Speak English;
• * not classified as either overweight or obese at start of study.
• Parents :
• - not able to read or speak English.
• High school peer mentors:
• - cannot speak and read English.