A few things to remember as you plan your Global Collaboration project ...
Google Hangouts is a wonderful tool for video calls with collaborating classrooms. It's also a great idea for teachers who are participating in the project to have a Google Hangout before beginning the project to establish procedures and norms for the Global Collaboration.
Padlet is a great tool that students can use to introduce themselves at the beginning of a Global Collaboration. Each teacher involved in the project can create a Padlet wall for the students in their class. Students can individually introduce themselves, include a video or photo, and list questions they have for students in the collaborating class. Padlet has recently updated to allow users to comment on each other's posts. This has been a game-changer with Global Collaborations projects! Note: teachers must turn on this function in the settings of Padlet. Check out my Global Collaborations reflection blog post here for more information!