Elementary grade students are back in school this week in Saint Peter. That's a small but important step on a long road to recovery for the tornado damaged school district. Middle school and high school students go back to classes next week, sharing the elementary buildings for the rest of the school year. Minnesota Public Radio's Tim Pugmire reports... (Sound of classroom chatter) At North Intermediate School in Saint Peter, sixth grade students are dissecting matter regurgitated by owls, looking for the small skeletons of rodents. The class is studying predators and scavangers in the animal world. The unsavory aspects of picking through the remains of an owl's meal is lost on these children, who've spent the past week picking through their scatt