A parent who does not meet the qualifications provided in section 15.1-23-03 may supervise home education but must be monitored in accordance with section 15.1-23-07 for the first two years. If a child receiving home education obtains a basic composite standardized achievement test score below the fiftieth percentile nationally, the parent must be monitored for at least one    additional school year and until the child receives a test score at or above the fiftieth percentile. If testing is not required by section 15.1-23-07 during the first two years of monitoring, the period of monitoring may not be extended, except upon the mutual consent of the parent and the monitor. If a parent completes the monitoring requirements of this section for one child, the parent may not be monitored with respect to other children for whom the parent supervises home education.