Short, yet detailed sections are divided into general categories of language & literature, history & geography, visual arts, music, mathematics, and science. What does your kindergartener need to learn in order for him/her to have a good education? Perfect for homeschoolers who enjoy the freedom to learn in whatever non-grade-segregated manner works best for them, the Core Knowledge Series isn't designed as a rigid comprehensive prescription, but as a way to provide a solid, common ground of knowledge that most students should have by the time they reach each grade.