Animal testing is a controversial practice, and many people have strong feelings about it. Understanding both sides of the debate about animal testing is crucial for the development of an informed opinion about this issue. Through unbiased main text and fact boxes, readers are presented with information and statistics used by those who support and oppose animal testing, and they are encouraged to use what they learn to decide where they stand. This critical-thinking exercise is enhanced through the use of full-color photographs and a well-designed graphic organizer.