This year why not send your sixth grader back to school in style with this cool saying Keep Calm And Rock The Sixth Grade. A great way to start off the first day of the new school year in sixth grade. Sixth-grade teachers will love it too. -- Choose from our vast selection of art prints and posters to match with your desired size to make the perfect print or poster. Pick your favorite: Movies, TV Shows, Art, and so much more! Available in mini, small, medium, large, and extra-large depending on