Extra-mural activities is a correct and usable expression in written English.
You could use it to describe activities that take place outside of the normal curriculum, such as field trips, community service or internships. For example, "We are looking to give our students more extramural activities to broaden their educational experience."
These extramural activities inevitably affected his work, and despite his first in part one of the English Tripos, he could only manage a 2,1 in his finals - to the irritation of the college authorities.
Her extramural activities tended to revolve around helping immigrants - having acted as the director of the joint council for the welfare of immigrants (1982-86) - and extending civil liberties through being chairman of the executive of Liberty (1992-96).
They're drawn together through a campaign to keep open their school's clubhouse for students' extramural activities, an institution run by the kids themselves that represents a link between fading traditions and the future.
If you are eligible (contact program staff by visiting their Division of Extramural Activities Web site to check on the details) you can submit your proposal without having to wait for a "program announcement" to be issued.
Nonetheless, at the NIH, a variety of extramural activities are available, including clubs for biking, judo, taekwondo, sailing, hiking, and yoga; there is even an NIH orchestra, says Phil Lenowitz, deputy director of NIH's Office of Human Resources.
At the time, Senator John Edwards was sinking: He probably had overstayed his Iowa welcome, camping out in the Hawkeye State for more than a year (and fretting, we now know, over certain extramural activities).
They said his recent "online statements [should be seen] as extramural activity as a citizen rather than as faculty performance".
Extramural research activities.
This reflects anxieties over provisions, to some extent amended, which it was felt would inhibit extramural, particularly political, activities of the paper's journalists.
These activities are sometimes called extramural studies, continuing education, higher adult education, or university adult education.
Other assignments are related to activities in intramural or extramural practice – for example an internship in a nursing home or consecutive interviews with a chronically ill patient.
