Is the 20-to-1 ratio (20 pupils to 1 teacher) an absolute 20?
No. The intent of the law is to provide instruction in classes of 20:1 for the entire school year. The 20-to-1 ratio, however, is an average of the daily enrollment counts for each individual class, from the first day of instruction through April 15. As stated in the previous question, this means that the enrollment in a class can exceed 20 for limited periods of time, as long as the daily average through April 15 does not exceed 20.44.