Describes an assay to determine the rate of photoreduction of 2,6-dichlorophenolindophenol (DCPIP). Acquaints students with experimental design and teaches them how to evaluate and communicate their results with the goal of enhancing their scientific literacy by integrating basic chemistry and arithmetic into their practical experience. (JRH)

Describes a general chemistry experiment that is carried out in sunlight to illustrate the ability of TiO2 to act as a photocatalyst by mineralizing an organic dye into carbon dioxide. Details about the construction of the reactor system used to perform this experiment are included. (DDR)

Presents suggestions for alternative presentations of some of the material that usually forms part of the introductory chemistry course. Emphasizes development of concepts from experimental results. Discusses electronic configurations and quantum numbers, experimental evidence for electron configurations, deducing the shell model from the periodic…

Presents an alternative approach to teaching reaction thermodynamics in introductory chemistry courses using calculations of enthalpies, entropies, and free energies of atomization. Uses a consistent concept, that of decomposition of a compound to its gaseous atoms, to discuss not only thermodynamic parameters but also equilibrium and…

Describes a directed research project that examines the territorial and aggressive behavior of crickets. Presents behavioral ecology laboratory experiments in which students test the hypothesis that crickets with established territories are more likely to win confrontations that intruding crickets. (Contains 11 references.) (ASK)

Describes a method for teaching biology that includes more investigative exercises that foster an environment for cooperative learning in introductory laboratories that focus on vertebrates. Fosters collaborative learning by facilitating interaction between students as they become experts on their representative vertebrate structures. (SAH)

Describes a science experiment involving plant seeds where students observe the germination and plant growth. (YDS)

Focuses on the curriculum movement. Discusses the educational conditions under which new courses would be developed. Explains the differences between the new science courses and traditional courses. First published in 1962. (YDS)

Explains the advantages and disadvantages of verification experiments in classrooms from the secondary school science teacher's point of view and discusses the reasons for difficulties and resistance in replacing verification experiments with inquiry experiments. (Contains 19 references.) (YDS)

Presents three biology activities involving insects that demonstrate basic ecological principles related to the forensic sciences. (Contains 15 references.) (YDS)

Assesses the effectiveness of two generative learning strategies, concept mapping and laboratory experiments, to determine if one is more effective with individual learners or learning groups in science classrooms. Indicates that students starting with concept maps showed higher achievement than students beginning with laboratory experiments, and…

Compares various detector technology for measuring the direction and magnitude of magnetic fields. (CCM)

Describes an experiment that involves the determination of the enthalpy change for a single reaction of the decomposition of aqueous hydrogen peroxide. (CCM)

Notes that water can be an important medium for science, math, and language activities and how encouraging young children to think about water helps them understand important concepts about how the world works. Offers detailed instructions for 13 classroom activities that use water to demonstrate a variety of concepts. (TJQ)

Uses a software package to prepare students for an organic synthesis using the Horner-Wittig reaction and investigates the role of the software in student learning. (Author/YDS)