Final answer:
Grade 6 in Social Studies marks the beginning of self-awareness in children about their roles as social creatures.
Step-by-step explanation:
The subject of this question is Social Studies and the grade level is Middle School. The significance of Grade 6, according to Mrs. Cunningham, is that it marks the beginning of self-awareness in children about their roles as social creatures. In the context of social studies, this refers to the development of a sense of self and understanding of social expectations within the broader society.