Science projects which can be used by high school students who have minimal experience with computers or electronics are presented in this book on laboratory interfacing. These laboratory interfacing projects include either the connecting of measuring instruments directly to a computer or using a computer to control external devices. All of the 14 projects of this book involve construction of electric circuits that connect to the Apple II plus or IIe game port. In each case, a core project is discussed and step-by-step instructions are given for its assembly and testing. Descriptions of each project include: (1) project requirements (containing electronics and programming information, lists of parts, supplies, and tools); (2) background information (examining the scientific basis of the project); (3) step-by-step instructions (specifying the methodology in building and using the project); (4) troubleshooting (offering corrective suggestions); (5) project extensions (recommending additional experiments); and (6) supplemental information (consisting of science and mathematics information and data on electronic components). A disk with sample programs is available. (ML)