Substitute Teachers During Prep. If a substitute teacher at the secondary level voluntarily teaches a sixth period, the substitute shall be paid one fifth (1/5) of the current substitute daily rate of pay for the sixth period, as the normal high school absence coverage would have been five classes. For non-traditional teaching contexts (as above), this fractional substitute daily rate shall be likewise modified in light of the site’s teaching schedule. E.g. in a 4x4 block schedule, the substitute teacher would be paid an additional one third (1/3) for covering a fourth class in addition to the three classes required to cover for one absent teacher.