The National Junior Honor Society, founded in 1929, emphasizes scholarship, leadership, service, citizenship, and character. The Lake Mountain Middle School chapter strives to instill these values in students through activities, highlighting membership as an honor and a pledge.

Selection for NJHS is considered a privilege granted by the school faculty, not an inherent right for any student. Students do not apply for National Junior Honor Society membership; instead, they await an invitation to provide information to support their candidacy. Membership is exclusively given to students chosen by the Faculty Council based on local selection criteria and national regulations. NJHS goes beyond academic achievement, requiring members to exhibit Leadership, Service, Citizenship, and Character. It's not an automatic process or election solely based on academic performance.