We have liked our daughter's experience at Mathnasium the past two summers and are sending her again this summer. I can't compare it to Kumon or Sylvan because we didn't even look at them, but I do know they do things other than math, and Mathnasium is only math, so the instructors have just a single focus. Mathnasium doesn't do one-on-one, every second; it does one-on-one, as needed, so the child comes in, gets the worksheets and personal instruction and help, then gets going on the work while the tutor moves to another child to get that child started, answer a question, etc. When your child has a question, needs help or is done and needs the work checked, the tutor returns to her. I think it works well. The atmosphere at our Mathnasium (DC area) has been very calm and quiet.Just our two cents. Give them a visit. If your daughter needs tutoring because of specific issues, be certain they wil cover those issues -- they use a curriculum they tend to keep in-house (they don't send home any of the worksheets, which I wish they would, but they seem to see them as their proprietary curriculum). That would be my only concern about them, if you really want to see what she's doing and keep her work.