On a Thursday night, junior Varsha Ramesh looked at her chemistry homework and sighed in frustration. It was the night before her AP Chemistry quiz. Completely confused, Ramesh decided to open up Facebook, but not to write on someone’s wall, browse photos or chat away. Instead, Ramesh clicked on the AP Chem group and opened the group chat and typed, “Did anyone get the right answer to No. 8 on the equilibrium worksheet?” In an instant, five people replied and explained their answers.