Teachers seeking online communication and collaboration opportunities with students and other educators have another free resource at their disposal: Edmodo, an education-based social networking site. Edmodo offers free classroom communication for teachers, students, and administrators on a secure social network. Teachers and students can post classroom materials, share links and videos, and access homework, grades, and school notices within Edmodo, which stores and shares all forms of digital content—including blogs, links, pictures, video, documents, and presentations. The site is accessible online or using any mobile device, including Android devices and iPhones, and has special institutional features for schools and districts that can be accessed free of charge by administrators. “The idea behind Edmodo is to provide a platform for teachers to be able to communicate with students, post messages, share content with each other, and post and grade assignments—but do it in a safe environment, where we aren’t requiring any private information from students,” said Betsy Whalen, vice president of social media and marketing for Edmodo. http://www.edmodo.com/