The phrase "expanded notion" refers to a broadened understanding or idea about something. It means exploring new perspectives or possibilities beyond the conventional or limited thinking on a particular subject. Full definition
In doing so, we are attempting to dissolve the distances between individual teaching methods and dramatically expand the notion of what a classroom can be. (edutopia.org)
By expanding the notion of student success, and moving it beyond a metric governed by test scores, authentic assessment puts the emphasis on student understanding. (ascd.org)
In the 1970s feminist artists expanded the notion of labor to encompass domestic work. (dailyserving.com)