Charter-Approved Curriculum This award-winning homeschool geography unit study is sure to make geography come to life for you and your children! Featuring four of the iconic Holling C. Holling books ( Minn of the Mississippi , Paddle to the Sea , Tree in the Trail , and Seabird ) children will learn about the Great Lak Beautiful Feet Books resource: https://www.bfbooks.com/products/charter-school-holling-4-7-geography-curriculum-unit-study