A downside to online school

My son doesn’t attend traditional public school.  He attends school from home via the Internet through a charter school.  Its not really homeschooling since I am not the one teaching him.  He has 6 teachers and has classes each day that he attends.  A downside to this I find for him is not having textbooks.  He does have access to online versions of textbooks but not the actual book here at home.  I find this is difficult for him in the area of math.  Other subjects he is fine, but math seems to be the biggest struggle.  I think it would so much easier for the students to have a textbook in hand to refer back too!!