Inclusion Criteria:

   - In the participating school district

   - 8-11.9 years old

   - BMI >= 85th percentile for age and sex on the 2000 Centers for Disease Control (CDC)
   growth charts

   - Clearance to participate from medical care provider

   - Willing, able, and available to attend an after school program

   - Not planning to move from school district within the next 12 months

   - Speaks and reads English or Spanish

   - Child has not repeated more than one grade in school

   - Completion of signed active informed consent (parent or guardian) and assent (child)
   to participate, which includes a description of the two interventions and requires
   their willingness to be randomized.

Exclusion Criteria:

The investigators' goal is to be as inclusive as possible, however, children will not be
eligible to participate if they:

   - Have a condition that limits their participation in physical activity enough that they
   are not able to participate in Physical Education at school (e.g. significant
   structural heart disease)

   - Have been diagnosed with a chronic illness that affects their growth and/or weight
   (e.g. type 1 diabetes, hypothyroidism, inflammatory bowel disease)

   - Have taken systemic steroids (oral, intravenous, or intramuscular) for a period of
   more than 21 days in the past year

   - Are taking other medications affecting their growth and/or weight [e.g.
   methylphenidate hydrochloride (HCL)]

   - Are pregnant

   - Are unable to complete the informed consent process