WASHINGTON (AP) — In a speech that drew fire even before he delivered it, President Barack Obama is telling the nation’s schoolchildren he “expects great things from each of you. At the end of the day, we can have the most dedicated teachers, the most supportive parents, and the best schools in the world,” Obama said. “And none of it will matter unless all of you fulfill your responsibilities.” The White House posted Obama’s remarks on its Web site at midday Monday. He’s scheduled to deliver the talk from Wakefield High School in suburban Arlington, Va., Tuesday.