code: def get_active_schedulings(self):
          
          blocks = EighthBlock.objects.get_blocks_this_year()
          scheduled_activities = EighthScheduledActivity.objects.filter(activity=self)
          scheduled_activities = scheduled_activities.filter(block__in=blocks)
  
          return scheduled_activities
docs: Return EighthScheduledActivity's of this activity since the beginning of the year.