The phrase "a time when students" is correct and usable in written English.
It can be used to refer to a specific period or occasion involving students, often in a narrative or descriptive context.
Example: "There was a time when students gathered in the library to study together for their final exams."
Alternatives: "an era in which students" or "a period during which students".
While graduation is a time of celebration, it's also a time when students face the unknown.
Graduation can be a large expense at a time when students are at their most cash-strapped.
Yet he remains immensely relieved not to have grown up in a time when students used university as preparation for the job market.
At a time when students were used to air raid drills, the fears of these cadets went beyond the general dread of a nuclear exchange.
Wintersession, the last week of Winter Recess before classes begin, is a time when students may participate in programs that encourage personal reflection, intellectual curiosity, and social interaction.
Borba also proposes honoring "Hero Days"—a time when students dress up as an admired historical figure while speaking as if they are that famous person.
The PIFS curriculum targets the sixth and seventh grades, a time when students make the difficult transition from elementary to middle school.
In truth, it was because it was spring break, a time when students in my "Covering Religion" seminar can travel without its interfering with other courses.
Chip, for one, is nostalgic for a time when students drew upon their own inner resources, instead of relying on event organizers hired by corporate sponsors to lay the fun on for them.
The senior year of high school, a time when students sometimes seem more focused on social pursuits than academics, may soon be a thing of the past for some Texas students.
Mr. Levy is selecting what he considers to be the city's strongest and most experienced superintendents to help guide their colleagues at a time when students and teachers are facing tougher standards.
