Describes a unit on magnetism that utilizes hands-on activities in which students make hypotheses for discrepant behavior, discover whether a magnet attracts one object through another, measure the strength of magnets, explore levitating paper clips, and play a game dependent on magnetic attraction. (MDH)

Describes problems with school science fairs including poor judging and a lack of understanding by the students of their own projects. Suggests improvements to the system. One suggestion is for science fair projects to be displayed only in classrooms and not district or regional fairs. (PR)

Describes a unit of study for elementary school science on bats. Students investigate the different types of bats; examine their behavior; find facts that other students are unlikely to know; write stories about bats; and examine the concept of echolocation, the means by which bats navigate. Suggests integrated activities for mathematics…

Proposes that students learn about their environment by taking field trips into their own schoolyard. Students observe, classify, hypothesize, infer, predict, and measure aspects of the schoolyard. Engages the students in discussion to process their experiences. (MDH)

Describes a course where students design and construct a sundial, once they understand the apparent movement of the sun. Explains general issues of daily astronomy and describes the design and construction of three sundials. (PR)

Reports on a questionnaire completed by 73 universities. Results indicate that laboratory instruction is part of almost all introductory biology classes. The majority (62%) of these institutions offer separate biology courses for majors and nonmajors. There is renewed interest in investigative types of laboratories. Most laboratory instruction…

Presents a model of a generic atom that is used to represent the movement of electrons from lower to higher levels and vice-versa due to excitation and de-excitation of the atom. As the process of de-excitation takes place, photons represented by colored ping-pong balls are emitted, indicating the emission of light. (MDH)

Describes the use of an indicator made from the pigment in red cabbage. Cabbage is grated then soaked in water. When the water is a strong red, the cabbage is strained out. The cabbage-juice indicator is then used to test for acids and bases. Includes a list of good foods to test for acidity and alkalinity. (PVD)

Describes how Mexican-American language-minority students construct biology concept meanings based on extant linguistic skills. Provides an instructional activity that engages students in constructing meanings through mediational means. Contains 35 references. (DDR)

Explains how students are able to interact with a team of interplanetary scientists at the National Aeronautics and Space Administration (NASA) by using the Iowa Communications Network (ICN). Discusses the professional development component in detail. (DDR)

Lists the benefits of hands-on experiments that are both low-cost and high-tech. Details four examples which include the use of contact lenses and compact disks. (DDR)

Presents an activity designed to stimulate student interest and facilitate the study of microorganisms. Focuses on an epidemic situation in which students play the role of epidemiologists. (DDR)

Presents a 12th-grade class project on measuring velocity-dependent forces encountered in two common forms of locomotion--rollerblading and cycling. (WRM)

Presents a lesson that addresses the scientific aspects of the evolution versus special creation controversy by having students gather evidence from the fossil record and analyze that evidence using critical-thinking skills. Contains 13 references. (WRM)

Describes a modification to an inexpensive pinewood derby car that can be used to demonstrate the summation of the force vectors important in sailing. (WRM)