Well, based on the main church's statement of beliefs, they just seem to be Pentecostals. Explains that school's focus on learning to do all of that.
Do Orthodox Christian think that we can practice and learn how to perform the miracles of God?
Orthodox believe that miracles can happen, and that God does them through human beings. However, you don't go to a school to "learn" how to do it, nor do you focus on "Signs and Wonders." Rather, you work on your salvation with fear and trembling in cooperation with God, and if God so chooses to use you to perform a miracle, then that's what happens.