Inclusion Criteria:  English-speaking Age 13 years, 0 months to 23 years, 11 months Meet diagnostic criteria for BD by KSADS-PL If BD-I, taking ≥1 mood stabilizing medication (i.e., antimanic anticonvulsant, antipsychotic, and/or lithium) Followed by a CAMH psychiatrist who provides ongoing care Able and willing to give informed consent/assent to participate  Exclusion Criteria:  Evidence of mental retardation, moderate to severe pervasive developmental disorder, or organic central nervous system disorder by the K-SADS-PL, parent report, medical history, or school records A life-threatening medical condition requiring immediate treatment Current victim of sexual or physical abuse Current substance use disorder other than mild cannabis or alcohol use disorder Meets assessment criteria for Level 3 at enrollment