The phrase "array of courses" is correct and usable in written English.
You can use it when referring to a large variety of courses that are available. For example, "This university offers an array of courses in the humanities and sciences."
FE colleges offer a confounding array of courses.
Raasay House offers an array of courses to satisfy energetic holidaymakers.
It remains a comprehensive university offering a vast array of courses from art history to neuroscience.
The main campus, at Amherst, provides a comprehensive array of courses within 10 colleges, schools, and faculties.
These offerings later diversified into an array of courses and Web-based simulations, many closely correlated to state educational standards.
Teachers College offers a wide array of courses on ESE across disciplines and departments.
The approach counters the "cafeteria-style" organization of most community colleges, whereby students must sort through an array of course offerings, programs and services.
Streamlining program requirements and creating clearly structured programs of study to help students gain traction toward degrees rather than be stymied by an overwhelming array of course options, unclear program requirements and a lack of guidance.
Located in historic Cambridge, Massachusetts, Harvard Law School offers its students a challenging, supportive atmosphere and access to its unmatched array of course and academic offerings, a global alumni network and a bustling campus life.
Since its foundation, WGS has coordinated a rich array of course offerings for both undergraduate and graduate students.
As an integral part of a major research university, the doctoral program at SSA enjoys full access to a rich array of course offerings within the University of Chicago.
