Presents a laboratory demonstration that helps students understand the concept of microscope calibration. (JRH)

Biology teachers at Ithaca College have developed a course in experimental methodology and instrumentation that teaches beginning biology students the need for accuracy and precision in measurement. This course is described. (JN)

A PET microcomputer is used as an accurate and programmable timer to support data acquisition from velocity experiments covering falling, rolling, and sliding objects, and human velocity, acceleration, and power measurements. The inexpensive instrumentation is simple and easy to use and compares favorably with conventional, more expensive…

Contends that the nature of physics has been misrepresented by blurring or ignoring important distinctions between "errors" and "discrepancies" and that dealing with these and related problems can improve students' enjoyment of labs and understanding of physics. Nature of physics, role of experiments, experimental errors, and error analysis are…