@timothysykes hi tim lets see the numbers. u said u have had 15000 students and they have $17 million $s in profits. math tells me each student averaged $1133 profit and paid you about $1200 yearly plus dvd's etc. etc. here is another thing that $1133 maybe over several years..
that sounds like big profits for you and huge losses for simple- minded students who need to master grade 4 math. all the best son BillH