My favorite Curriculum:
Math: Rightstart Math
Science: Apologia Science
Spelling: Spelling Power
Writing: IEW (Hands-down, this is the BEST!)
Reading: 100 Easy Lessons (for teaching reading)
Writing: Handwriting Without Tears
History books: For supplemental reading, I have used Story of the World, but I also like the free books about history found on James Baldwin Project.
Most of all, I LOVE Classical Conversations curriculum.