Another book you may enjoy is the Student's History of Philosophy, by Arthur Kenyon Rogers. I'm sure you could find a copy through abebooks.com.
I studied to be a K-12 English teacher, went through the entire program, got my degree and certificate, but never taught professionally. But, as a result, I find myself reading many old high school and college text books on American literature, rhetoric and composition, history, and philosophy. The books used before FDR are undoubtedly (IMO) far better than those used after FDR. I attribute this to two factors. 1. The influence of John Dewey, whose social construct (to borrow the Left’s Marxist terminology) of education, which believed that Man could be perfected through education and socially engineered to become virtuous through state-run schools (still lauded, though roundly trounced by the Germans, who were the most educated people on the planet when they undertook their two attempts to conquer Europe), and 2. FDR's braintrust, which glorified academe and began the idol-worship of university degrees. This had a trickle-down effect into education, where PhDs were forced to invent new approaches to education and to implement them in government-run schools. I, myself, was a victim of the “Open Classroom” experiment that lasted for a few years. I'm still trying to fill the educational gaps from my government-run education.
Carolyn