The National Museum of African American History and Culture has an awesome website, broken into sections of support for educators and parents to help kids understand race, racism, and the experiences and contributions of African American people in our nation. There are great connections to exhibits and educational resources from the museum, as well.
Angst is a documentary featuring kids with anxiety diagnoses, talking about their experiences and how they got support. I really enjoyed it and found it to be empowering and normalizing for kids with this diagnosis. The website has great resources in terms of apps, websites, and more to support coping with anxiety.