I am torn between these 3. I am new to homeschooling and want to buy a boxed curriculum (everything you need for the school year). I have 4 kids and this is new to me, so I thought a complete package would work best to help me get started. I will be teaching Pre-K, K, and 2nd. (I plan to do my own thing for Pre-K). Any recommendations? I want a curriculum that works good for teaching multiple children. I also want to be able to use the materials from my oldest for his younger siblings (with the exception of their workbooks of course). I hope they don't change the curriculum so that you can't use previous parent guide books.