The task for 2014-2015 was to Erase a Chalkboard. And by "chalkboard," I think you meant "whiteboard."
Sarah, Becca, Cole, Sydney, and Stephanie. Duration_0_17
Julia, Jessica, Jacob, Cat, and Sydney. Duration_2_34
Jordan, Avery, and Meredith. Duration_1_21
Virginia, Jack, Emily, and Alex. Duration_0_13
Spencer, Caden, and Andy(?) Duration_0_36
Dixen and friends(?) Duration_0_49
Daniel, Andrew, and Tyler. Duration_0_23
Cameron, Zoe, (?) Duration_1_32
Hannah, Anna Laura, Raegan, Andrew, and Marcus(?) Duration_0_32