Science content, related laboratory skills and techniques, and methods of instruction are addressed as important components in the preparation of secondary science teachers. The integration of field experiences throughout the preparation process and the effectiveness of each component in this process are discussed. (KR)

A University of Michigan dental school curriculum for oral surgery that uses human cadaver heads is described. Selection, preparation, and laboratory use of the materials are outlined. Faculty and students have received the sequence well and found it prepared them for clinical rotation. (MSE)

Described is a simple demonstration that relates the techniques of magnetic resonance imaging (MRI) used in medicine and nuclear magnetic resonance (NMR) spectroscopy. Included are materials, procedures, and probable results. (KR)

Described is a demonstration that provides an introduction to nonequilibrium reaction-diffusion systems and the coupling of hydrodynamics to chemical reactions. Experiments that demonstrate autocatalytic behavior that are effected by gravity and convection are included. (KR)

Presented is a method for demonstrating the use of various fractionating columns to resolve mixtures into individual components and to correlate the resolving powers of column packings to their "hold-up" volumes. Fractions were analyzed using refractive indices. (KR)

Describes a demonstration using a variety of clear solutions in which the instructor asks students whether the solutions appear homogeneous or inadequately mixed. The solutions are then induced to fluoresce with ultraviolet light to provide visible evidence of homogeneity or nonhomogeneity. (PR)

Describes procedures for identifying the protein ribonuclease from plant tissue extracts using mini-gel electrophoresis. (PR)

Describes a yearlong project that involves biology students in monitoring water quality. Includes details of the awareness phase, action phase, and presentation phase. Discusses student reaction to the project. (DDR)

Presents details of how a local stream is studied as part of a ninth-grade science curriculum, the goal of which is to learn about the school's ecosystem. Provides examples of specific group projects related to the stream. (DDR)

Presents an exercise that describes the direct extraction and purification of DNA from a small soil sample. Also discusses the subsequent amplification of a 343-bp Tn7 transposate A gene fragment (tnsA) from a strain of Pseudomonas aureofaciens 3732RNL11. Contains 21 references. (DDR)

Reports on a study that examined the prior use of simulation on frog dissection in improving students' actual dissection performance and learning of frog anatomy and morphology. Finds that students who performed the simulation before dissection performed significantly better than students who performed dissection before using the simulation or…

Presents pencil-and-paper and laboratory activities to be used as part of a high school-level biotechnology unit. (WRM)

Outlines the development of a kinetic study using the enzyme Lactaid to hydrolyze the synthetic substrate of lactose into an undergraduate laboratory experiment. Provides students with experience doing order-of-magnitude estimates. (DDR)

Describes a simple circuit based on an inexpensive quad operational amplifier that permits a direct-reading temperature instrument to be constructed using silicon diodes. Encourages the use of this equipment in introductory thermal experiments. (DDR)

Introductory biology laboratory experiences frequently rely on preserved chordates for anatomical study. Unfortunately, these preserved organisms rarely reflect the appearance of a living creature. Since community colleges are generally prohibited the use of live chordates, this paper describes the autopsy of a "road kill" squirrel to facilitate…