There are lots of classes and private student opportunities emerge constantly. The company seems to be well-known internationally for providing ESL.
Cons
A teacher must be ready to accept an assignment with only a 2-day notice. You may not be given the text for the assignment until the day before the class starts. Communication between various departments can be erratic. The teacher must spend considerable unpaid time entering grades & attendance into the database system, in addition to creating and posting lesson plans.