Cabin John Middle School (CJMS) is part of the Montgomery County (Maryland) school district. MCPS is one of the largest school districts in the United States. We are located in the Washington D.C. suburbs. CJMS is committed to an academic environment that promotes rigor, relevancy and relationships. CJMS is committed to educate all students in a supportive, challenging, and disciplined environment so that they become lifelong learners and a credit to themselves and society.