Complex sentence: In some institutions called "Technical Schools" there is an extra grade, for those who want to graduate as "Middle technician" in certain area, wich allows them to be hired according to their level, or get introduced more easily into a college career.
Split into simpler sentences: In some institutions called "Technical Schools" there is an extra grade, for those who want to graduate as "Middle technician" in a certain area. This education would allow them to be hired at a higher level, or get introduced more easily into a college career.