Bennett, J., M. Donahue, N. Schneider, M. Voits,
The Cosmic Perspective
, Lebanon, IN: Addison Wesley. 2000. This is a good teacher resource.
Freedman, R.A and W.J. Kaufmann
, New York, NY: W.H. Freeman & Co. 2000. I particularly enjoyed this book as a good introduction to astronomy for myself.
Gauss, Karl Friedrich.
Theory of Motion of the Heavenly Bodies Moving About the Sun in Conic Sections: A Translation of Theoria Motus
, Mineola, NY: Dover Publications. 2004. In addition to borrowing a bit from the title of this work I found the preface to be quite interesting. As it turns out, the significance of this particular work is in the realm statistics, specifically regression analysis.
The University of Chicago School Mathematics Project,
Functions, Statistics, and Trigonometry
, Scott Foresman Addison Wesley. 1998. This is the textbook used for this unit.