var $teachers = {
  ivanov: {
    id: 1,
    name: "Ivanov Ivan Ivanovich",
    photo: "/images/ivanov.gif"
  },
  petrov: {
    id: 2,
    name: "Petrov Petr Petrovich",
    photo: "/images/petrov.gif"
  }
};

var $schedule = [
  {teacher: $teacher.ivanov,
   starts: "13:00",
   ends: "14:00",
   weekdays: [1, 3], // понедельник и среда
   direction: "Танцы с плюшевыми мишками"
  }
];

var teacherLessons = function(t) {
  var $result = [];
  $.each($schedule, function(l)) {
    if(t==l.teacher || t==l.teacher.id) {
      $result.push(l);
    }
  });

  return $result;
}