I just got the free download for unit one of this curriculum and I must say it is PERFECT !!! The first unit is free if you subscribe to their email so it does not hurt to try it out. Included is history, geography, science, and the arts. I absolutely love it !!! http://www.layers-of-learning.com/
Ps. I did buy the planers for grades k-4 and 5-12 they are so worth the .99 each 
Susan Khan
Wow they sure got more organised since I last looked! it really does look amazing. I am hesitant to jump on board for a 4 year rotation when only half of it is complete as yet HOWEVER just that one year alone that is complete would be well worth the time and money. Truly a Bargain. I particularly love the book and video recommendations for further study. My at kids ALWAYS want further study and its difficult to find it all at the library.
I signed up. I will check out the free one and probably buy the years worth and at the very least leave it lying around for self study :biggrin: