Gaelcholáiste Reachrann was founded in September 2001. The school's first Junior Certificate examinations were held in 2004, and its first Leaving Certificate examinations in 2007. The founding principal was Fionnuala Ní Chaisil, followed by Máire Ní Ghealbháin. The current principal is Eimer Nic an Rí. The school was the subject of media coverage due to their development and marketing of the "Béal na nGael" badge. "The aim of the badge is to let the world know that the user is both willing and able to speak Irish, and the students say that what they are promoting is 'a practical product to stimulate more peer-to-peer communication through Irish.'" The Béal na nGael is a modern variant of the Fáinne, a badge worn to indicate a degree of fluency in, and willingness to communicate in, the Irish language. In 2018, Reachrann was featured in an article in the Irish Independent, entitled "Schools build relationships to inspire better performance" where its academic success was discussed.
Academics
Gaelcholáiste Reachrann offers the Irish Junior Cycle and Leaving Certificate curricula. The school also operates the Transition Year programme, which is mandatory for all students in the college. All subjects are taught through the medium of Irish.
Sport
Gaelcholáiste Reachrann has a proud sporting tradition, fielding teams in Gaelic Football, Hurling, Camogie, Soccer, Basketball, Badminton and Frisbee. In January 2020, one of the school's students played on the Irish U18 football team in an international friendly against Australia, where the Irish team won 2-0. In 2016, Reachrann won both the Dublin and Leinster Gaelic Football championships, however, the team lost the All-Ireland final by 4 points to Mayo's St. Joseph's C.C. In May 2013, Reachrann became the Dublin Hurling champions, after defeating Coolmine Community School 4-5 to 3-5 in the Dublin Schools Juvenile Hurling final.
Extra-Curricular Activities
Gaelcholáiste Reachrann participates in the annual BT Young Scientist and Technology Exhibition. In 2018, one of their students achieved 3rd place in the intermediate individual category in the Biological and Ecological Sciences section. The school has a Grúpa Ceoil which rehearses and performs Irish Traditional Music. This traditional music group has performed in public on many occasions, most notably in the DDLETB Festival of Music, Gael Linn's Scléip and Trócaire's Trad for Trócaire. In 2015 the school won the Best Production award in the Féile Náisiúnta Scoildrámaíochta in Mullingar with their performance of the playMiotach. The play also won the award for Best Costumes in the Bord Gáis Energy Student Theater Awards.
