Historically, what I plan for and purchase for the upcoming school year goes bye-bye by September. I think I now have a handle on this. I finally have accepted the fact that no matter what I like, or how I would have loved to learn, or how all the kids on this board learn, these guys are just not going to suddenly morph into read-and-write-for-fun, follow-rabbit-trails-all-the-livelong-day, scholars.
Kid 1 has turned into somewhat of an unschooler. I finally realized how much stuff he is learning "off the clock". So once he has done my minimum (which is pretty minimal), he is free to YouTube, Food Network, Weather Channel, etc to his heart's content.
Kid 2 is a competitive athlete and a 13 year old boy. Oy. I have recently simplified our lives by signing up for Time4Learning to help him become a little more independent. We may actually get science done! I am still going to use some of the other stuff I have (Geography, logic puzzles, mythology), and we always have a few read-alouds going.
Flexibility--it's a good thing!