"optional subject" is correct and usable in written English.
It is an adjective phrase that can be used to describe a subject or topic in a sentence, often one that is not required or necessary. For example, "Choosing an optional subject for this course gave me the freedom to explore something new."
Teachers fear a major review of the national curriculum, being launched today by the education secretary Michael Gove, will demote citizenship to an optional subject.
While the language part of English will remain compulsory, with all its form-filling functionality, literature will be an optional subject alongside French, wood-work, and the rest.
While Gove is working to downgrade citizenship to an optional subject, David Cameron is speaking of the need for young people to understand their responsibilities, as well as their rights.
History has been an optional subject since GCSEs were introduced in the 1980s Then it was taken by just over a third of students; in 2011 by just under a third.
Religious education should now become an optional subject, like languages.
This is an optional subject of the Computer Science program, in which design quality and smells are addressed.
This means sentences can comprise of optional subjects and objects, followed by a required verb.
According to the curriculum, the Victorian period and World War II are optional subjects.
It comprises three compulsory subjects (Croatian language, mathematics, and a foreign language) and optional subjects and is a prerequisite for a university education.
It comprises three compulsory subjects (Croatian language, mathematics, and a foreign language) and optional subjects and is a prerequisite for university education.
CAM and CAT are offered as optional subjects at certain nursing schools, but not in a systematic way [ 24]; as a result, students do not gain a thorough grounding in the use of these therapies [ 11].
