Check out this neat way to interactive with others using an online whiteboard. "A Web Whiteboard is touch-friendly online whiteboard app that lets you use your computer, tablet or smartphone to easily draw sketches, collaborate with others and share them with the world." - from awwapp.com Share your whiteboard with students from grades K-12 and have everyone in your class interact on the same whiteboard. No sign is required, but you do need a way to get the link to your interactive whiteboard to your students. Website: https://www.awwapp.com, also available as an Android app. On an iPad, open Safari and go to the website in order to access from the iPad.