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Adviser Jennifer Risken, center, listens as Christopher Cossu, left, and Spencer Hagerstrand, right, both 10 and fifth-graders at Walnut Acres Elementary School in Walnut Creek, talk about their science project "How to Make Electricity From Dirt" 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)

At the Mt. Diablo School District science fair for students in grades 3-5, Michelle Fernandez, left, an adviser from College Park High School, listens as Anna Shin, 10, a fourth-grader at Fair Oaks Elementary School in Pleasant Hill, talks about her science project, "What Makes the Water Clear." The fair, co-sponsored by Diablo Valley Lodge 448 and Concord Chapter 384, of the Order of the Eastern Star, was held Saturday at the Willow Creek Center in Concord.

DAN ROSENSTRAUCH/Staff




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