Just to put the details: the data model is the core. Please design it carefully so it can support the following:
Country, University, Location, Department
Faculty, Course number-title, pre-reqs, etc.
Review of the course: tags, mad-sad-glad text, overall rating score (take a look at existing ratemyprofessor.com for other measures, e.g., if course was online or in-person, mandatory or not, grade received, when they took the course, etc.)
User registration and authentication
Please create a Domain Model of your data model for better communication with other team members.
Add model classes and migrations