Office Hours: am – pm. Friday (except holidays and school breaks).Welcome to Travis Unified School District Online Enrollment. Online enrollment allows you to quickly start the process of registering your child for school. Dual Residency Affidavit. If you and your student are currently residing with another family you will need to complete. LTISD welcomes all new students who meet the following criteria: 1. Live within LTISD's school attendance zones; and 2. Meet the current residents and notable alumni of the Department of Neurosurgery at NYU Langone.