What are the important topics your community wrestles with? What are the "nondiscussables" the community is reluctant to engage?
What larger, global issues are at play that might be impacting your students, their families, and the community?
Ask your students. What justice issues perplex, agitate, and engage them? When do they feel they are getting screwed over?
Keep your eyes and ears open as you move through your day. What social justice topics might point toward a rich learning experience?
Look for connections to your standards ALL THE TIME, which requires an intimate familiarity with your content. And you don't have to choose between justice topics and your content - this is about choosing both!
Resource: Check out Teaching Tolerance for classroom resources and project ideas, and take your standards to the next level by integrating their Social Justice Standards.
#2 ATTEND TO Your own learning & views
After you pick a topic, where do you stand on that issue? Do some learning and research to broaden your understanding, including getting familiar with all sides of the issue. Don't go into the project blind.
There's some identity work inherent to good preparation for tackling these topics. Know your triggers on the issue. Have a plan for how you will keep your opinions from influencing student thinking.
If you are team teaching, do some learning together!
Go visit with members of the community. Go to possible field trip locations.
#3 bounce it around
Bounce your ideas around with peers, students, friends, significant other, and possible community partners.
Run it by your director/principal to make him/her aware of the path you are going down.
#4 DRIVING QUESTION
Develop a Driving Question that can remain at the forefront of student thinking. Don't bury a meaningful topic/issue inside some professional problem to solve. Students grappling with authentic justice issues should be the priority.
Imagine your students, at multiple phases of a project, wrestling with this Driving Question. Will it challenge them? Will they, over time, be capable of thinking with more depth and nuance in response to the question?