Voxer is a Walkie Talkie messaging app for your smartphone with live voice (like a PTT walkie talkie), text, photo and location sharing. Download Voxer for iPhone, Android, or use Voxer for web

In the fall, I’m teaching both my undergrad and grad class online (thankfully, GMU and the history department made this an easy and non-controversial choice, despite GMU’s plans to offe…