[4] The school administration believed that a seven-year course of study would ensure "moral influence" and a "uniform and homogeneous course of teaching and of training.

[4][6] Following the split, BC High initially remained in the South End, but moved to its current Dorchester campus in 1950.

[9] Students who graduated from BC High in good standing were automatically admitted to Boston College without examination.

"[8][12]) Due to its shared history with Boston College, BC High has always been open to students of all faiths.

"[13] Nonetheless, the state government required the founders to open the school to students of all religious backgrounds, as reflected in Boston College's founding charter.

[16] However, in 2017 BC High appointed its first female president, Grace Cotter Regan, who stated that she would respect the board and alumni's wishes to continue single-sex education.

[7][20] In 2023, BC High announced that it was launching a $125 million fundraising campaign to expand the scholarship fund and upgrade the campus.

[24] In 2016, BC High trustee Jack Dunn successfully threatened to sue Spotlight's filmmakers for defamation.

The film's distributor issued a statement clarifying that Dunn had not personally covered up sexual abuse at BC High.

The program aims to "prioritize entrepreneurial thinking while preparing students for the rapidly evolving innovation economy".

The joint project with the neighboring University of Massachusetts Boston was made possible with a $2 million donation from the Yawkey Foundation.

Sponsored sports include baseball, basketball, cross country, football, golf, ice hockey, lacrosse, rowing, rugby, sailing, skiing, soccer, swimming and diving, tennis, track and field, ultimate, volleyball, and wrestling.

[41] The BC High Lacrosse Team has won the Division 1 South Sectional Championship 4 times in the last 5 years: 2016, 2017, 2018, and 2021 (No Season in 2020 due to the Covid-19 Pandemic).

The team won the Massachusetts Division 1 State Championship over Acton-Boxborough Regional High School in 2018 by a score of 16-3.

Principal athletic facilities include Edward T. Barry Ice Rink (capacity: 1,000), McNeice Pavilion, Monan Park (500), and Viola Stadium.