This is another page that has multiple resources. Like my previous posting, you can search diversity. It has printable pages that can be used as lessons within a classroom.
This page has a little bit of everything. Tools, guides, lesson plans, etc. Plus, you can type "diversity" into the search bar on this site and get many articles on diversity.
I recently went through the Master Resiliency Trainer Course (MRT) and it's a very good course. We had to figure out what our character strengths were by taking the VIA (Values in action) survey. There is one on this link for kids. Imagine if you KNEW what your student strengths were. Imagine if they knew what their strengths were. Could this impact your teaching? Under questionnaires, take the VIA for yourself. Have your students take it. It could be useful.