3rd grade reading level:

    Adler, David. The Babe and I.  New York, NY: Gulliver Books Harcourt Brace & Company, 1999.

    Booth, David. The Dust Bowl.  Buffalo, NY: Kids Can Press Ltd, 1996.

    Cooper, Floyd and Littlesugar, Amy.  Tree of Hope.  New York, NY: Philomel Books, 1999.

    Taylor, Mildred. The Friendship.  New York, NY: Dial Books for Young Readers, 1987.

    Taylor, Mildred.  The Gold Cadillac.  New York, NY: Dial Books for Young Readers, 1987.

4th grade reading level:
Recorvits, Helen, Goodbye, Walter Malinski. Farrar, Staus and Giroux, New York: 1999.

Taylor, Mildred, Mississippi Bridge. Bantam Books, New York: 1990.

Taylor, Mildred, The Well, Pufin Books, New York: 1995.
 

5th grade reading level:
Curtis, Christopher Paul.  Bud, Not Buddy.  New York: Delacorte Press, 1999.

6th grade reading level:
Taylor, Mildred D.  Roll of Thunder Hear My Cry.  Puffin Books  New York: 1976