A naturalized U.S. citizen, he is a native of El Salvador. Mr. Herrera holds a master's degree in conflict analysis and resolution from George Mason University, and has served in Iraq and Afghanistan with the U.S. Army Reserves. The pull of the classroom, however, has kept him coming back to teach. In this exclusive interview with Colorín Colorado, Mr. Herrera offers some of his insights about the problems that ELL students face, as well as the steps that ELL teachers can take to support them.