private void InitializeLists()
{
SubjectAssignmentServiceClient schedService = new SubjectAssignmentServiceClient();
currentSY = schedService.GetCurrentSY();
gradeLevels = new List<GradeLevel>(schedService.GetAllGradeLevels());
gradeLevels.RemoveAll(x => x.GradeLev == "0");
sections = new List<GradeSection>(schedService.GetAllSections());
subjects = new List<Subject>(schedService.GetAllSubjects());
timeslots = new List<Timeslot>(schedService.GetTimeslots());
rooms = new List<Room>(schedService.GetAllRooms());
teachers = new List<Teacher>(schedService.GetAllTeachers());
}