One back-to-school activity I love for middle or high school students is Meme Wars. Using Jamboard helps students practice tech skills AND respectful collaboration practices, and using this activity at the beginning of the year allows you to get to know your students, introduce them to the classroom norms, and share some laughs with them.
 
Who doesn’t love a good meme? And while the picture itself counts towards the hilarity factor, the *caption* is what truly makes it or breaks it