Gloucester High School will host the annual Back-2-School Block Party and Community Resource Fair this Saturday from 2 to 6 p.m. The event offers free school supplies, lunch, live entertainment, games, and health resources for students in Gloucester, Mathews and Middlesex counties. Sponsored by Blessed Couples United Outreach, Gloucester Toyota, and the local school district, the fair will also feature support from healthcare groups and public safety partners.