Does anyone have any experience with this particular math curriculum? Advantages, drawbacks, positives, negatives, etc? We're going to be unschooling...er, using student-led learning techniques for the most part next year but I'd like to use a structured math curriculum. Zack struggles a bit with mathematical concepts, although has no problem with real-life application, and it's my weakest subject so I want to make sure we're not overlooking anything. His first grade class currently uses Saxon Math and he HATES it. I don't like it either, but he is definitely a tactile/kinesthetic learner so I want a curriculum with manipulatives. I'd love some feedback!