The start and end times of BPS schools vary, as do the lengths of the school day. Some BPS schools have a longer school day through the "Schedule A" Expanded Learning Time (ELT) agreement. The Boston Public Schools, in accordance with its nondiscrimination policies, does not discriminate in its programs, facilities, or employment or educational opportunities on the basis of race, color, age, criminal record (inquiries only), disability, homelessness, sex/gender, gender identity, religion, national origin, ancestry, sexual orientation, genetics or military status, and does not tolerate any form of retaliation, or bias-based intimidation, threat or harassment that demeans individuals’ dignity or interferes with their ability to learn or work. " />