Literally, curricular innovation means "new curriculum" or "new courses", in the context of a change that has not been attempted before.
For teachers, curricular innovation would mean developing new ways to teach a subject. [ For example, trying a new (for the teacher) technique of teaching students a difficult subject by expressing concepts in terms of other subjects that the students enjoy, or
better understand, would be an application of curricular innovation.
For school administrators, curricular innovation would more likely refer to a radical change in what subjects are taught, or how different subjects are organized into different classes. One example of curricular innovation of this type would be the combination of two related courses into a single class (at my high school, there was an honors class that combined english with history/social studies). It is also possible that this would refer to an administration level policy to encourage, enforce curricular innovation as described in the first paragraph.
For students, curricular innovation might refer to new methods of studying, but it is more likely to mean one of the above concepts being imposed upon them. ]
There are no new answers.