Doodle is a free tool for scheduling group meetings with the input of all group members. Doodle is essentially a polling platform. To use Doodle you create a meeting title, select a series of dates and times for a possible meeting, then invite people to choose the dates and times that work best for them. As the administrator of a scheduling poll you can set the final meeting time based on the most commonly selected date and time.
The video below provides an overview of the Doodle interface.
Applications for Education
Doodle could be useful for scheduling all kinds of school related meetings from IEP meetings to department meetings to PTA meetings, Doodle can help you make sure your meeting is held at the best time for the majority of participants.
I learned about Doodle when Tom Daccord invited me to a meeting he was trying to schedule.