‘7 Little Johnstons’: Emma & Alex Celebrate Their Final First Day Of High School (Exclusive)

In an exclusive sneak peek at this week’s “7 Little Johnstons,” summer vacation has come to an end, and Emma and Alex are kicking off their senior year and celebrating their last first day of high school. Trent and Amber decorate the house to mark the milestone and look back on their sweet childhood moments. “7 Little Johnstons” airs Tuesdays at 10/9c on TLC.