Hi Jennifer,
I'm not sure if anyone has responded to your post yet so I hope I'm not repetitive in the information I'm about to give.
1. LCSS
http://www.laurel.kyschools.us/Curriculum/ElementaryCirriculum/CurriculumFrameworks.html
According to public schools:Reading/Language, Arts, Writing, Math, Science, Social Studies, Arts & Humanitites, Practicial Living/Vocational Studies, Technology
According to hslda.org homeschool: Reading, Writing, Spelling, Grammar, History, Mathematics, and Civics.
2. Depending on your three y/o will depend on what do to: play-doh, puzzles, coloring, etc? Or maybe he's ready for something more challenging?
3. I use Horizons curriculum for my just turned five y/o son. (it's through Alpha Omega Publications) it's an advanced curriculum, but you can contact them about your child's ability and they also have preschool materials.
I hope this helps.
Melody
currently in KY