In higher education, we know what is a major or a minor. What do we call it when there are only a cluster of courses, say 9-12 credit hours in the same discipline that is not part of a major like concentration or emphasis? The intent is to make them available to non-majors to broaden their credentials. In some professional disciplines like education or social work, the name 'endorsement' may make sense. In other areas, is there a name that is both intuitive and academically sound?
Such mini-programs are sometimes called certificates.
Certificate programs are sometimes meant to be completed stand-alone, often by students who are not enrolled in a degree program but are looking for continuing education in a particular area, e.g. to help with their career. However, they can also be taken on top of a bachelor's or graduate degree. They often consist of just a few courses.
As an example, you can read about my own institution's Certificate in Music Technology, which consists of 12 credit hours.
The following assumes the US. If these courses aren't meant as a package, then they might be collected under a heading like "course offerings for non-majors". If they are meant as a package, and there's a natural order to them (e.g. biology I, biology II), it's often called a sequence for non-majors. I'm not aware of a word for an unordered group of courses meant as a package.
As has been noted, if there is a certificate afterward, or some sort of formal recognition, "Certificate" is a common one.
"Concentration" is another one I've encountered being used, when it's not a standalone thing, but more of a group of classes that one could arrive at via a number of different paths. For example, we have a group of classes open to a number of different majors that adds a particular flavor to them, without actually changing the major itself, that gives them all a concentration in X topic.