DETROIT LAKES — As Robert Ingersoll once said, "We rise by lifting others.” Sixth graders at Detroit Lakes Middle School put those words into action this spring as part of their language arts class. "As part of our annual essay unit in language arts, students were set to a task: Choose a charity, write a research-based persuasive essay, and present it to their classmates," said DLMS language arts instructor Nicole Courneya. "The classes then vot…