PAM WALKER and ELAINE WOOD each have more han twenty years of science teaching experience. They are the authors of dozens of books for middle and high school science teachers and students, including Crime Scene Investigations and Hands-On General Science Activities with Real-Life Applications, both from Jossey-Bass.
""Each activity begins with a concise explanation of the concept upon which it focuses and includes a materials list, the procedure, follow-up questions, and extensions. These high-interest investigations use materials that are inexpensive, easily accessible, and familiar to students"" (National Science Teacher's Association.org, October 2010)