Inclusion Criteria:

- 7 - 18 years old

- survived childhood acute lymphoblastic leukemia (defined as being off treatment for
at least 2 years)

- greater than or equal to 85th percentile BMI-for-age and gender)

- read and speak English

- have a parent that reads and speaks English or Spanish

- willingness to attend assessments

- access to the Internet

Exclusion Criteria:

- any comorbidities of obesity that require immediate sub-specialist referral including
pseudotumor cerebri, sleep apnea, and obesity hypoventilation syndrome

- any subject with a known disease of the liver, pancreas or small intestine that would
adversely effect digestion or absorption of nutrients

- any pulmonary, cardiovascular, orthopedic, or musculoskeletal problem that would
limit ability to adhere to moderate-level physical activity recommendations

- have a history of substance abuse or other psychiatric disorder that would impair
compliance with the study protocol

- are using any medications which alter body weight

- are currently enrolled in another weight loss program

- in foster care