The phrase "acted as instructors" is correct and usable in written English.
You can use it when describing someone who performed the role or function of an instructor or teacher in a particular context.
Example: "During the workshop, several experienced professionals acted as instructors, guiding the participants through the learning process."
Alternatives: "served as teachers" or "functioned as educators".
Corruption in South Africa Islamists to the fore ReprintsIn Iraq and in Washington, many would have preferred to have retained an American force in Iraq of 3,000-5,000 people to have acted as instructors for Iraqi soldiers and police, and to provide security to the gigantic American embassy.
Thanks also to the staff of the Child and Adolescent Mental Health Service who acted as instructors and to Gloria Claessen who contributed to the training curriculum and acted as a trainer of instructors.
The beach boys came to act as instructors, lifeguards and entertainers, spreading the gospel of surfing to dreamy-eyed tourists of all ages.
The exhibition highlights the work of more than two dozen Zimbabwean artists, among them Jonathan Mhondorohuma, Sylvester Mubayi and Agnes Nyanhongo, who will act as instructors.
-- to act as instructors in a course supposed to woo Croatian officers away from old, Communist habits and instill the values of a democratic army.
One of those may have been Lotfi Raissi, an Algerian pilot brought to court in London today, accused of having acted as the "lead instructor" to 4 of the 19 hijackers while they were all in Arizona.
Teams were given at least 3 weeks of in-class work time in which the instructors acted as consultants.
The instructor acted as facilitator to help solve any problems the students might encounter and to clarify the rules for students when the students were playing the game.
The Rollins baseball coach, Bob Rikeman, said Johnson would act as an instructor to the team.
Physicians taking part in the study are asked to name a certified local physiotherapist or an university trained sport scientist interested to act as exercise instructor (trainer) for the fall prevention program.
Smith acted as the sole administrator and instructor of the medical school until 1810, when a second faculty member was hired.
