This is a great chart that shows how a read aloud (high support) is used to eventually become an Independent Resource (low support) for students to read on their own or at home.

http://earlylearningcentral.ca/wp-content/uploads/2009/02/literacy-and-the-young-child-GRR-p64-65.pdf

One is done with a poem and the other is a Big Book that is repetative, and is simple to follow (level C).  I just finished this book-I Went Walking with my class and they loved it.  Here is a 5 day plan for the book.  http://www.eworkshop.on.ca/edu/pdf/Mod08_WP_k_l_went_walking.pdf