Youth With A Mission offers many training programs and the option to pursue a degree via the University of the Nations (UofN). Most programs are made up of a lecture phase and some sort of field assignment. There are many different focuses for these programs, from worship and Bible to cinematography and medicine. You can find a list of available programs and more info about the UofN at ywam.org.
The prerequisite school to any other program or to be on staff is the Discipleship Training School (DTS). YWAM Nashville is currently offering this course.