CREATE VIEW [dbo].[TeachersStudents]
AS
SELECT     T.teacherId, TC.classId, S.studentId, S.studentFirstName, S.studentLastName,
 C.className, CS.classstudentAcademicYear, T.teacherFirstName,
                      T.teacherLastName
FROM         dbo.Teachers AS T INNER JOIN
                      dbo.TeachersClasses AS TC ON T.teacherId = TC.teacherId LEFT OUTER JOIN
                      dbo.ClassesStudents AS CS ON TC.classId = CS.classId LEFT OUTER JOIN
                      dbo.Classes AS C ON TC.classId = C.classId LEFT OUTER JOIN
                      dbo.Students AS S ON CS.studentId = S.studentId

TeachersClasses -> TeachersStudents by teacherId and classId

    [MetadataType(typeof(TeachersStudents_MD))]
    public partial class TeachersStudents
    {
        public class TeachersStudents_MD
        {
            [FilterUIHint("Cascade")]
            [nacDA.Cascade("Teachers")]
            public object TeachersClasses { get; set; }
        }
    }

    [MetadataType(typeof(TeachersClasses_MD))]
    public partial class TeachersClasses
    {
        public string classCall
        {
            get
            {
                return this.Classes.className;
            }
        }
        [DisplayColumn("classCall")]
        public class TeachersClasses_MD
        {
        }
    }

If I understand correctly.