Try:
SELECT Students.StudentID, CampusList_1.Name As Campus1,
CampusList_2.Name As Campus2, CampusList_3.Name As Campus3,
Students.Session1, Students.Session2, Students.Session3,
Students.StudentName as FirstName,
Students.StudentLastName as LastName,
Students.DateOfBirth, Students.Street, Students.AppartmentNo,
Students.City, Students.State, Students.ZipCode, Students.Phone,
Students.ParentFirstName, Students.ParentLastName, Students.SSN,
Students.SchoolYear, Students.Semester,
iif(Students.Sibling, 'Yes', 'No') as Sibling,
iif(Students.Accepted, 'Yes', 'No') as Accepted,
iif(Students.Waitlisted, 'Yes', 'No') As Waitlisted,
Students.ApplicationDate, Students.CurrentSchool,
Students.AltenatePhone
FROM Students
LEFT JOIN CampusList AS CampusList_1
ON Students.Campus1 = CampusList_1.CampusID
LEFT JOIN CampusList AS CampusList_2
ON Students.Campus2 = CampusList_2.CampusID
LEFT JOIN CampusList AS CampusList_3
ON Students.Campus3 = CampusList_3.CampusID
LEFT JOIN SessionTable AS Session_1
ON Session_1.SessionId = Students.Session1
LEFT JOIN SessionTable AS Session_2
ON Session_2.SessionId = Students.Session2
LEFT JOIN SessionTable AS Session_3
ON Session_3.SessionId = Students.Session3
ORDER BY Students.StudentID