One of April’s big news stories was Diane Sawyer’s interview with Bruce Jenner, who has come out this year as transgender. Bruce, who noted plans to change name and pronoun in the near future, isn’t the first transgender person in the spotlight. Chaz Bono, born to Cher and Sonny Bono and named Chastity at birth, came out a transgender man in 2009. Laverne Cox is an accomplished actress (most recently on Orange is the New Black) and has been a vocal activist for transgender rights and Lana Wachowski, who directed The Matrix trilogy and Cloud Atlas with her brother, was the first major Hollywood director to come out as transgender in 2012. And while these people have bravely discussed their gender in the spotlight, they are a small fraction of the many people identifying as transgender around the world. We’re learning more and more about the range of gender identities that exist, and this week we’ll focus on an introduction to gender identity.