When parents drop their kids off to Miami Lakes Middle School, Principal Dr. Manuel Sanchez lets them know each day that their children are now his kids. “Their kids are my kids,” said Sanchez, who is the father of two young children. “I treat them as if they are my own biological kids. They don’t have to wait to see me, they can come to my office at any time to talk or they see me a lot in the classrooms and...