If your child reads at home he/she will be successful completing AR points. If you child is only reading during Prime , it will be difficult to accomplish this. I would suggest that you plan on an additional 15-20 minutes of reading a day if your child currently has 18-20 points. If you child does not, I recommend an additional 30 minutes a day. Remember that this counts towards 10% of the English Grade and the grade is added during the  semester grading cycle.