Class is officially back in session, and we saw firsthand how cute your tots were heading back to school. From preschool to kids hitting elementary school, we loved getting a glimpse of what your family's first day was like. We asked you to grab your mobile phone and upload pictures of your lil one heading back to school with our latest Instagram Challenge, and we thank you for sharing that special moment with us. Click through for a sweet roundup of budding new students heading back to the classroom. And don't go far — our next Instagram challenge is just days away!