The phrase "took courses on" is correct and usable in written English
You can use it when referring to the act of enrolling in and completing educational classes on a specific subject.
Example: "Last semester, I took courses on data science and machine learning to enhance my skills."
Alternatives: "completed classes in" or "enrolled in courses about"
So I did and attended Wellesley College and Yale law school and enrolled at the Yale Child Study Center, where I took courses on children and medicine and completed one post-graduate year of study.
I still took courses on theology, art, maths, photography, French, and more.
She took courses on aging issues and became certified to operate an assisted-living facility, then took a job in a hospital's geriatric psychiatry unit.
They got free seedlings from GreenThumb and took courses on growing and selling food from the City Farms project at the local nonprofit Just Food.
He earned a scholarship to a teacher's school, and then another to Southeast University, in Nanjing, where he took courses on political economy and acquired a relatively decent grasp of English.
"I've totally high-fived Archbishop Desmond Tutu," said Kevin Moore, the ship's technologist-in-residence. For the students, who took courses on travel writing and oceanography and partied in port, the Unreasonable crew was a fraternity unto themselves, huddled with their laptops in the cafeteria.
Moreover, the sample of the study consists of undergraduates, who were purposively selected from different disciplines within one comprehensive university, all of whom were currently taking courses on campus and volunteered to participate.
Students can take courses on their own, of course.
I've taken courses on death, grief, and dying.
Directors of listed firms must now take courses on their responsibilities.
Errol is a city fireman taking courses on his days off.
