The official end of summer in the Douglas County School District is today, as school is back in session. The Douglas County Sheriff Office wants you to be particularly alert for children, watch your speed in school zones, and don’t pass a school bus when it is stopped with its flashers on. Up at the lake, Whittell High School and Zephyr Cove Elementary students will have a couple of extra weeks of summer vacation because they don’t start until Monday, August 28th.