It will print one for each teacher. You may want to add an AND statement to only print for a certain teacher or period.
Here you go:
LIST STU SEC MST AUT TCH STU.ID STU.LN STU.FN STU.GR TCH.TE AUT.ST? AUT.SDT AUT.CD AUT.CD? BY TCH.TE IF AUT.CD : "MR" AND AUT.SDT > 07/01/2017
Run it, then click on Report. It will give you the option box that allows you to set the spacing, and put a page break between each teacher.