Michelle Fernandez, left, an adviser from College Park High School, listens as Anna Shin, right,10, a fourth-grader at Fair Oaks Elementary School in Concord, talks about her science project, "What Makes the Water Clear" at the district science fair co-sponsored by the Diablo Valley Lodge 448 and Concord Chapter 384 at the Willow Creek Center in Concord, Calif., on Saturday, March 9, 2013. (Dan Rosenstrauch/Staff)