Due to the in-depth study of Western culture and it's roots, a number of colleges/universities are willing to grant academic credit for students who participate on this trip if the students will make arrangements in advance with the college/university. Typically, it is the Humanities Department you will want to make arrangements with prior to the trip and they want to see a list of the sites you will visit, plus some of the Socratic discussions that you will have.
A typical requirement of the University is that your would enroll in an online Humanities or History course, read a couple of books, and write a report on the books, plus on the ClassicalTrips.org trip. Contact your college/university for specific details.
ClassialTrips.org will gladly provide an overview of the sites and Socratic discussions that take place on the trips for University analysis and approval.