Students of Shoreline Unified School District saw several new faces and some old ones as they returned to classes on Wednesday. The district has eight new teachers in its schools and two administrative interim principals at Tomales High School. When Superintendent Adam Jennings stepped out of his role as high school principal in 2021, John McGurke—a former language teacher at the school—stepped in. But Mr. McGurke suffered a concussion that left him with lasting symptoms…