Brooklyn Laboratory Charter School | 2,215 followers on LinkedIn. Main: 347-473-8340 Admissions: 347-853-6762 Web: https://www.bklabprep.org/ | Brooklyn Laboratory Charter Schools (LAB) is a network of open enrollment, college-prep, public charter schools that opened its first middle school in downtown Brooklyn in 2014. LAB opened its second middle school in the fall of 2016, and will open its first high school in the fall of 2017 also in downtown Brooklyn. LAB is dedicated to serving the highest need students regardless of their academic level, English language proficiency, or disability.