During each subsequent year, another grade or two was added until eventually in May 1986, it graduated its first class of High School students.

[6] The school had been recognized for its athletic accomplishments, particularly for those of its basketball team, which had been successful at recruiting players across the United States and around the world to play in Rockville.

Dr. Otis Ray Hope,[16] senior pastor at the Montrose Baptist Church, resigned in October 2002 after questioning by the church's governing council about his involvement with the Maryland International Students Association,[17] an organization that recruited foreign students attending Montrose Christian School.

[19] In February 2012 a female teacher at Montrose Christian School was arrested and charged with sexually abusing a student for a period of over one year.

[20][21] Due to fiscal mismanagement, the school had suffered from financial difficulties in its later years and had 16 liens placed against its properties.