private static function getSchoolsForUnclaimed(MongoId $jobId)
 {
     global $S;
     $schools = [];
     $unclaimed = ApplicationStudent::getUnclaimedByJob($jobId);
     foreach ($unclaimed as $application) {
         $studentId = $application->getStudentId();
         $student = StudentModel::getById($studentId, ['email' => 1]);
         $email = $student['email'];
         $school = $S->nameOf($email);
         $schools[] = $school;
     }
     return $schools;
 }