Our daughter enjoys going which is s bonus since summer break is a time for kids to unwind from the stresses that a full daily education setting with few breaks can create during the school year. I know that even if spending the summer reviewing and strengthening what she has already mastered while going back to pick up areas which were not mastered will assist her in staying on top of this subject versus a downward math slide.
My daughter started out with a D in math and ended the year on the honor roll with the only A in math she has ever received. They accomplished this in around 10 weeks. This is by far the best investment I could have made for her education. You should absolutely call them for an appointment.