Students on March 14 play “Phytoplankton Bingo” by looking through microscopes to identify microorganisms found in Narragansett Bay, during the Tech Collective’s 12th annual GRRL Tech Interactive Technology Expo. More than 470 high school girls from around the state participated in the expo at the University of Rhode Island. The event is designed to let students learn about job opportunities in the STEM fields of science, technology, engineering and math. Students attended workshops held across the university’s South Kingstown campus. Sixty educators also participated in the expo.