ShowMe is a completely free, easy-to-use app to create, edit and share whiteboard lessons for classrooms. It allows teachers to use a combination of recorded videos and voice-over with text in lessons. It has thousands of users around the world from Singapore, Hong Kong to Turkey, England and USA. 

ShowMe allows students to interact with teachers, post their thoughts, ask questions and learn in a safe, creative space. You can record a voice-over and add text to a whiteboard for the lesson plan or an assignment.