The phrase "certain subjects" refers to specific topics or areas of study. It means particular areas of knowledge or subjects that are being referred to in a conversation or context. Full definition
Online learning provided crucial options for them and was important in meeting their needs related to limited financial resources and difficulties in hiring teachers in certain subject areas. (educationworld.com)
Basically a question to help give readers more of a voice a place to sound off on certain subjects on the blog. (blog.tsg.tv)
These teacher shortages are proving especially acute in certain subject areas like special education, science, and mathematics. (educationnext.org)