Scrutiny from conservatives around teaching about race, gender and sexuality has made many teachers reluctant to discuss issues that touch on cultural divides. To fill in gaps, some students are looking to social media, where online personalities, nonprofit organizations and teachers are experimenting with ways to connect with them outside the confines of school. The platform has opened new opportunities for educators looking to expand students’ worldviews. Isis Spann, for one, turned to developing digital content after officials in a South Carolina school system discouraged her from sharing stories about some civil rights movement figures with her kindergarten students.