New Skills - No Scores Research Study

Inclusion Criteria: * measured IQ and adaptive functioning scores of ≤75 as measured by the Kaufman Brief Intelligence Test-2 (KBIT-2) and Vineland Adaptive Behavior Scales-III (VABS-III). A score \> 75 for participants that do not have a syndrome that is associated with ID will be exclusionary. However, participants with such syndromes (e.g., Down syndrome) may have scores above this cut-point but are still classified as having an intellectual disability and thus will qualify for the study. * Participants must be ambulatory and in sufficiently good health to engage in moderate-to-vigorous physical activity * able to communicate verbally in English, follow simple instructions, and provide assent. * approval from the participants' primary care physician and specialists (as necessary) will be required for participation. Exclusion Criteria: * uncontrolled medical or significant psychiatric condition * insulin-dependent diabetes * physical/orthopedic impairment that would preclude participation in physical activity * legally blind or deaf * habitual problem behaviors such as aggression, noncompliance, or leaving an activity area.