For me it's mostly about time. I tend to be drawn to resources that are time intensive for setting up or because they teach the parent how to teach the subject to the child. That's why I wish I had more time in the day to be able to use BFSU, The Writer's Jungle, JUMP Math, and BookShark's Eastern Hemisphere. As if I don't have enough Resources to juggle, I just received the GEMS unit Life through Time. It looks amazing- better than I thought it would be. However, the set up requires quite a few resources and time to put them all together. I may end up saving it for next year. I also wish I had more time to play with math outside of our curriculum. My dd would love more math games, puzzles, tricks, activities, stories, etc.