The phrase "a group of active" is correct and usable in written English.
It can be used to describe a collection of individuals or entities that are currently engaged in an activity or are dynamic in nature.
Example: "The conference was attended by a group of active participants who contributed valuable insights during the discussions."
Alternatives: "a team of engaged" or "a cohort of dynamic".
He said some of those killed, the "Class A" group of active Communists, were "enemies" who had attacked police stations.
Dammarenediol-II is the nucleus of dammarane-type ginsenosides, which are a group of active triterpenoids exhibiting various pharmacological activities.
Chapple was finally accepted into the ETU and quickly absorbed into the activities of the Islington branch which, effectively, was run by a group of active communists.
Tanshinone is a group of active diterpenes widely used in treatment of cardiovascular diseases.
The founders, usually a group of active parents and educators, must submit an application to the state that outlines the school's mission, what the academic program will include, the goals and the methods of assessing achievement.
There is, however, a group of active volcanoes just south of the Dahlak Archipelago (15° 50′ N), as well as a recently extinct volcano on the island of Jabal Al-Ṭāʾir.
Petraeus is overseeing a group of active-duty and former officers in the writing of a new joint Army/Marine Corps counterinsurgency field manual.
BELTON, Tex — A group of active-duty soldiers and veterans gathered a few weeks back at a lodge in the scrub-brush wilds near Fort Hood to write songs about their lives with Texas singer-songwriters.
This week, a group of active-duty military members and veterans who are blind or have experienced vision loss, are participating in the U.S. Association of Blind Athletes Goalball Camp, hosted by the Maryland School for the Blind.
As she became a prominent voice in the antiwar movement, she heard a feminist speak to a group of active-duty soldiers in effort to educate them on the women's movement.
"It's all well and good to have policies, but until there is deep-rooted culture change within the military, this is simply a piece of paper," said Erin Cuomo, a founder of #NotInMyMarineCorps, a group of active-duty and veteran female Marines started in the aftermath of the Marines United scandal.
