First, being graduated from one of the teacher training universities. Also there are some media noticing for these individuals. In addition passing some theoretical and practical examinations. Eventually they invite accepted person to interview them.It has specific rolls and principles you should accept for example: what you covering, where you going, what is your religious?
Sometimes a video or skype interview is done, from overseas. Most times it is a simple phone call, making sure you meet the criteria they are seeking and then your provided with a ticket after you go through the E2 visa process.