These 2 puzzles complete the Puzzling Call Numbers Set. "Travel the World with Dewey" includes the 600-900 Dewey numbers. Students "fly" the airplane book cards to the continent with the corresponding Dewey category. An answer key is included for students to check their work. "Stack the Dewey Pyramids" includes the 500-900 Dewey numbers. Students stack pieces from the same Dewey hundreds category together (in order) to form a pyramid; there are 5 pyramids in all. Pyramids are color coded for self-checking. Two great activities to use with the other Dewey puzzles in your library centers, or as separate activities of the upper Dewey categories.