code: def increment_lesson(self, measure_val):
          
          if not self.data or not measure_val or math.isnan(measure_val):
              return False
          if self.data['signal_smoothing']:
              measure_val = self.smoothing_value * 0.25 + 0.75 * measure_val
              self.smoothing_value = measure_val
          if self.lesson_num < self.max_lesson_num:
              if measure_val > self.data['thresholds'][self.lesson_num]:
                  self.lesson_num += 1
                  config = {}
                  parameters = self.data['parameters']
                  for key in parameters:
                      config[key] = parameters[key][self.lesson_num]
                  logger.info('{0} lesson changed. Now in lesson {1}: {2}'
                              .format(self._brain_name,
                                      self.lesson_num,
                                      ', '.join([str(x) + ' -> ' + str(config[x])
                                          for x in config])))
                  return True
          return False
docs: Increments the lesson number depending on the progress given.
          :param measure_val: Measure of progress (either reward or percentage
                 steps completed).
          :return Whether the lesson was incremented.