What term refers to a variety of surfaces used in classrooms for writing and teaching?

The term that best describes a variety of surfaces used in classrooms for writing and teaching is "class boards." This term encompasses not only traditional chalkboards but also other surfaces such as whiteboards and smartboards that serve similar purposes in an educational setting.

Class boards are integral to classroom settings as they allow instructors to present information, engage students, and facilitate interactive learning experiences. While "chalkboards" specifically refer to a type of class board, the term "class boards" is broader and captures the full range of writing surfaces that can be used in educational environments.

The other options, although related to the teaching and learning process, do not quite convey the same inclusive concept. Instructional surfaces could refer to any surface used for educational purposes, but the phrase lacks the specific contextual meaning that "class boards" provides. Teaching aids encompass various materials and tools that assist in instruction but do not specifically denote surfaces used for writing.