Join.me is a web conferencing service that makes it easy to share your screen and talk with others in realtime. I first gave it a try in 2010. Since then Join.me's list of features has expanded. The latest feature is a new iPad app that you can use to host or join virtual conferences on Join.me. The iPad app is free to download and use to join conferences hosted by others. To host your own conference through the iPad app you will have to be a subscriber to Join.me pro. There is a still a free hosting option for the desktop version of Join.me.
Applications for Education
Join.me takes just a few minutes to set-up on your desktop. Once it's set up you can share your screen and invite others to join your conference. Joining a Join.me conference doesn't require anything other than entering the room number assigned to the conference. This ease of joining a conference makes Join.me a convenient tool for students to use to get some virtual assistance from you.
H/T to TechCrunch.