public function paginateResults($courseId)
 {
     return $this->getAllByCourseId($courseId)->skip(\Request::input('page', 1))->limit(pagination_pages())->get();
 }
 public function paginateResults()
 {
     return Instructor::skip((\Request::input('page', 1) - 1) * pagination_pages())->take(pagination_pages())->get();
 }
 public function paginateResults()
 {
     return $this->getAll()->skip((\Request::input('page', 1) - 1) * pagination_pages())->take(pagination_pages())->get();
 }
 public function paginateResults($subject_id)
 {
     return $this->findBySubjectId($subject_id)->skip((\Request::input('page', 1) - 1) * pagination_pages())->take(pagination_pages())->get();
 }