Social Justice is a topic that should be talked about in all grades, pushing students to open up their minds to diversity, and inspiring students to engage in critical thinking about what goes on in their communities.
The Learning for Justice website has many great resources for teachers and students alike when searching for information to educating oneself on all matters of justice.
Here are a couple podcasts that I listen to regularly to inform my teaching and learn about tools and resources which I can use to better myself for my students.