Paul Kunkel’s foolproof, tried-and-true 21 day program teaches any litter-trained cat to use a toilet instead of a litter box. It doesn’t require anything fancy—a toilet, a stack of magazines or newsp
Paul Kunkel, who toilet-trained his first cat while in college and who has continued to train his own and his friends' cats ever since, presents a foolproof, 21-Day-Program for teaching any litter-tr
This collection of Sketchpad activities builds upon the strengths of dynamic mathematical representations to enrich the study of first-year algebra, covering such topics as:- ratios and exponents- alg
