Jaime Buschman was greeted Tuesday by a sea of smiling faces and energetic “Good mornings” from third grade students while they molded clay sculptures at their desks. It was the first day back from summer break at the Petaluma City School District, and the first time Buschman would welcome students as Valley Vista Elementary’s newly hired principal. “I am so excited to be a part of this community,” Buschman said Tuesday morning. “Valley Vista is always spoken amongst us as a hidden gem; that it is just such a unique school in that the sense of community from (transitional kindergarten) to sixth grade is so strong.”