Cognitive Training in the Virtual Reality Setting With Children Undergoing Radiotherapy for Brain Tumors

Inclusion Criteria: * Initiating radiotherapy for a BT * Between 8-22 years of age at the time of enrollment * English or Spanish as the primary language * Research participant and one parent willing to participate and provide consent/assent according to institutional guidelines * Participant willing to take part in required aspects of Cogmed training Exclusion Criteria: * Significant impairment in global intellectual functioning (estimated or full scale IQ \< 70 based on standardized testing routinely conducted on primary treatment protocols or as part of the New Oncology Program in Psychology \[NOPP\]) * History of significant neurological disease preceding BT diagnosis including stroke or head injury with loss of consciousness * Major sensory or motor impairment that would preclude valid cognitive testing secondary to inability to complete study procedures (e.g., blindness, paresis, poorly controlled seizures/photosensitive epilepsy, inadequate balance to sit or stand unassisted to complete cognitive training) * Psychiatric condition that would preclude or take precedence over study participation (e.g. active psychosis, suicidal ideation) * Need for general anesthesia during radiation therapy (note: can participate if only sedated for simulation/planning but not daily treatment)