Padlet allows users to create documents and webpages that can be edited and shared by others. It requires creating an account to view, create, and share content. The Center for Interactive Learning and Collaboration works to advance learning across subjects through collaborative technologies and connects teachers to projects within and outside the US. iEARN-USA uses the internet and technologies to engage youth worldwide in collaborative learning and project-based work addressing curriculum and global issues. Collaborize Classroom enables the creation, sharing, and downloading of lessons on different topics and subjects that can be edited, include attachments, and are useful for all types of learners.