FYI: As your child's primary educator, it is up to you determine the grade level which you teach your child. I am not a fan of grade level thinking. I believe that children can learn on many different grade levels at one time. You should teach your child at the level and the speed in which he/she is capable.
Free World U
A Beka Scope & Sequence
BJU Press Scope & Sequence
Sonlight Scope and Sequence
K- 12 Course of Study from about.com