Does it count as homeschooling, if it's only preschool?
What a silly question!
Answer: since you can get into arguments about curriculum, it must be homeschooling?
Is preschool too young to learn to read?
Should a preschooler be unschooled?
Should a preschooler follow a structured curriculum?
I find that one system that works as part of the preschool homeschool curriculum for me is Time4Learning with their learning games.