To create a link from the Columbia University Directory of Classes to a course web page,
To create a link from CourseWorks to a course web page,
In “Pages”, create a new page, with the following content (edited using their tools):
Please visit the following web page for all information about this course:
Spring 2018 Undergraduate Seminars
http://www.math.columbia.edu/~bayer/S18/Seminar/
Set this as the “Front Page”, then back in “Home”, select this page as the Home Page.