The 1981 softball team finished the season with a 23-5-1 record after winning the Group I state title with a 2-0 one-hitter against Becton Regional High School in the championship game.

[22][23] The 1987 girls' basketball team finished the season with a 24–4 record after winning the Non-Public Group B state title with a 54–40 victory against runner-up Bishop Eustace in the championship game played at Brookdale Community College.

[29] The boys basketball team won the Non-Public Group A title in 2008 vs. Camden Catholic High School and in 2009 vs. Christian Brothers Academy.

[35] The 1984 team finished the season with a record of 11-0 after winning the Parochial B North sectional title after defeating Pope John XXIII Regional High School by a score of 12–0 in the championship game.

Frauenheim coached his 400th career game on November 17, 2006, when the Spartans defeated Holy Spirit High School in the NJSIAA semifinals by a score of 35–6.

[43] The Spartans won 23 consecutive games in the 2006–2007 seasons (12 in 2006, 11 in 2007), the longest streak in team history, before losing in the NJSIAA Non-Public Group III state final by a score of 26–13 to Holy Spirit High School on December 1, 2007, at Rutgers University.

Among the many accolades the band has achieved are: marching in the 1989 Presidential Inaugural Parade in Washington DC, and traveling to Canada, Virginia, and Florida, and all over the Northeastern United States.

In 2008, the band placed first in USSBA National Competition at the Annapolis Naval Academy winning Best Music, Percussion, Colorguard, and Overall Effect with their show called "Heroes".

[45] In the 2011 competition season, the band won the USSBA (now USBands) Group 6 Open New Jersey state championships with a score of 96.925 with their show "The Planetarium", taking the captions for Best Visual, Best Effect, Best Color Guard, Best Percussion, and The Cadets Award for Excellence.

They also placed second in National Competition at the United States Naval Academy in Annapolis with a score of 97.988, winning awards for Best Music, Best Effect, Best Color Guard & Best Percussion.

At National, IHS came out first over 15 band, taking home the Best Music special award and scored a 96.587, narrowly winning the title by .049 points over their nearest competitor.

[48] In November 2013, former Immaculata volunteer coach Patrick Lott was sentenced to six years in prison after he pleaded guilty to multiple counts of child endangerment and invasion of privacy.