PhD programs are available in a number of disciplines, including engineering, medicine and many other fields. Many students take a PhD as a stepping stone to getting a Bachelor's or a Master's degree, but there are also a number of PhD programs that focus on a particular area of study. Students generally make a PhD as part of their PhD program after they've completed some years of undergraduate coursework and have passed a number of exams. This does not mean, however, that all PhD candidates from American PhD programs are necessarily directly enrolled in the program right out of undergraduate school.
In some cases, students choose a PhD program because they already want to get their master's degree and want to work together with their professors to help with their education. Other times, it's because they want to be able to do a more specialized job once they have their master's degree in hand.
In most cases, students choose a PhD program so that they can get a bachelor's degree in a field related to their PhD. This can be done by taking courses in a subject like history, art, mathematics or even psychology, depending on the student's interests and how he or she plans to use those subjects in their career. There may be specific courses in a PhD program that will require the student to take that will prepare him or her for a bachelor's degree, but there are also general courses that will take place during the program that do not. These general courses are usually more convenient to take than classes that require a specific subject matter knowledge.
Many of these general courses can be taken even before the students begin their academic program, as long as the students show the faculty that they can meet course requirements through a combination of coursework, lab work and other work that they do throughout their academic career. The program may have specific requirements on how long it takes to complete the coursework in order to be allowed into the degree program, but all students who enroll in the same curriculum are still expected to complete it.
Once students complete their PhD program and are able to submit their dissertation for admission into the program, they will have another year or two to complete their studies. It may also take them longer if they decide to extend their program by getting a post-graduate internship. This is an excellent way to get some hands-on experience in a particular area that they are interested in and give them valuable hands-on experience while studying for the dissertation credit.
PhD degrees are great for . . . . . . people who want to change careers quickly after having a degree from a recognized institution. Some of these jobs pay very well, while others pay more in salary but don't offer the same benefits.