@Override
	public boolean prepareActivity(Player p) {
		switch (Randomizer.getRandom().nextInt(4)) {
		case 0:
			this.course = Ressource.otherCourse;
			this.course.setTopic(Topic.BIO);
			return false;
		case 1:
			this.course = Ressource.otherCourse;
			this.course.setTopic(Topic.MATH);
			return false;
		case 2:
			this.course = null;
			return false;
		case 3:
			this.course = p.getBook().getUndoneCourse(Ressource.listCourse);
			return true;
		default:
			break;
		}
		return false;
	}