Teachers walk arm-in-arm with students and parents into Tuscano Elementary School as they stage a "walk-in" for higher pay and school funding Wednesday, April 11, 2018, in Phoenix. Teachers gathered outside Arizona schools to show solidarity in their demand for higher salaries staging "walk-ins" at approximately 1,000 schools that are part of a statewide campaign for a 20 percent raise and more than $1 billion in new education funding. (AP Photo/Ross D. Franklin)