Teachers nationwide are protesting their paychecks. Educators in Arizona voted to walk out, joining similar efforts in Oklahoma, West Virginia and Kentucky. Teachers are speaking up at the same time that students around the country are mobilizing against gun violence. Thousands of public school students across the country planned to walk out on Friday in remembrance of the 19th anniversary of the Columbine High School shooting that killed 13 people in 1999. Read More: Marjory Stoneman Douglas