Discs look good! Tested and working! Ships free. The Geometry: An Interactive Journey to Mastery DVD is a textbook in the subject area of Mathematics, authored by James S. Tanton. Published in 2014 by Teaching Company, LLC, T.H.E., this educational DVD offers an interactive learning experience for adult and further education students looking to master geometry concepts. With free shipping included, this product provides a comprehensive and engaging way for learners to delve into the world of geometry in the comfort of their own homes.