Have you heard of Flipgrid? Did you know it's got amazing potential for engaging students and teachers in global learning? Check out this great blog by Matthew Frattali on the #TeachSDGs website: Using asynchronous video to augment student voice.
Essentially, Sir Ken Robinson and the World's Largest Lesson invite global educators around their world to contribute little videos (it took me 4 minutes using my smartphone) about what they're up to. You can then reply to these videos and engage in a dialogue etc. The Flipgrid code is globaleducator. Similarly, there is one for students too, where young people have posted #SDG related videos and questions and invite replies - I've watched a few, they're lovely! The flipgrid code is globalvoice.