Astronomy Resource - Universe at Your Fingertips

The Astronomical Society of the Pacific has a long history of compiling the best astronomical resources for teachers. For years, at professional development workshops we used activities from their "Universe at Your Fingertips" book, that required a 4" D-ring binder to hold. When we gave each teacher a copy, they were always appreciative until they had to pack the heavy binder in their luggage for the trip home.