Dr. Martin Luther King, Jr. Collaborative Classroom Poster. This is a great, inclusive, community-building Martin Luther King Day activity. Appropriate accompaniment for your Black History Month studies or any unit/lesson on Dr. Martin Luther King, Jr., civil rights, social justice, etc. This poster of Dr. King is a great way to start a unit or to finish one. My collaboration posters are easy for teachers and fun for kids and make a lasting impression—on students, parents, and your entire school