Building and enhancing new literacies across the curriculum focuses on media and digital literacies. Media literacy is the ability to identify different types of media and understand the messages they are communicating. It is not about criticizing media, merely producing media, teaching with media, or analyzing media from a single perspective. Challenges to teaching media literacy include determining how to teach it, how to measure its effectiveness, and whether the goal is to protect children from media's potential harms or enhance appreciation of media.