Teachhub, a K-12 website, presents an article that lists positive uses for cellphones as a student response system. For example, in a flipped classroom scenario, teachers can record their lessons on phones so that students outside class can listen to them. Cell phones can also be used to deliver curriculum materials to students. The article offers some solutions for problematic cellphone use as well, including lack of access (to phones or to wireless) and how to keep cell phone use appropriate.