What qualities distinguish a professional teacher from a non professional teacher?

A professional teacher has a heart for teaching; she or he knows the subject and works hard to develop lessons that are interesting and relevant to students. A professional teacher is interested in the school's and her students' development. On the other hand, a non-professional teacher teaches because it is a job. This teacher is interested in the income more than teaching, and may be absent a lot or may not be prepared for lessons. Certainly, a non professional teacher does no more than is needed; whereas, a professional goes above and beyond basic requirements of the job.