“Now we’re walking out… across the marsh!” This is not something you hear most teens shout on a typical weekday, but a group of take-charge girls from Belmont’s Notre Dame High School got the chance during one of Save The Bay’s DIRT programs. And they did more than announce their next steps: they filmed them! A student named Gina from Notre Dame’s AP Biology class captured the whole trip on camera as part of a web series called: “Teens Do Science.” Gina caught the action as her classmates took measurements on soil characteristics and assessed plant biodiversity. She was eager …