Civil Rights Teaching
https://www.civilrightsteaching.org/
This exceptional site is focused entirely on teaching different elements of the Civil Rights movement to students of all ages, including numerous teaching and study resources divided into different sections, such as "Critiquing the Traditional Narrative," "Desegregation," "Voting Rights," and even "Student Engagement and Contemporary Connections."
The Rendell Center: "March" Civil Rights Trilogy Lesson Plans & Resources
https://rendellcenter.org/programs/lesson-plans-materials/
Another excellent resource, specifically focused on Lewis's March trilogy and providing many teaching and learning materials...