Describes a laboratory teaching method that utilizes open-ended investigations that are meaningful and relevant, yet do not demand excessive amounts of the student's time. (MLH)

Presents design and construction details of a controlled temperature heat block. Includes information about the heater block, thermistor probe, circuit board, and the housing. (DDR)

Describes a freshman laboratory program designed to interface between the substances that surround students in their ordinary lives and abstract principles presented in chemistry classrooms. Course organization is based on the nature of the materials themselves, which include household chemicals such as hydrogen peroxide, food and beverages, pills…

Defends cookbooks and lab manuals. Both can provide reliable procedures; are good places to start; and need not stand in the way of understanding, insight, or imagination. (MM)

Describes the necking of polymer sheets that occurs when they are stretched. Discusses the effect and the mechanisms of necking. Lists four references. (YP)

Explains the procedures used to determine the regulatory properties of yeast pyruvate kinase. Involves a partial purification using PEG precipitation that can be done in one laboratory period with simple equipment. (DDR)

Describes a biology unit designed so that students pose their own questions and perform experiments to answer these questions. Plasmodial slime mold is employed as the focus of the study with background information about the mold provided. (DDR)

A simple procedure to quickly screen different consumer products for the presence of lead, cadmium, and other metals is described. This screening technique avoids expending a lot of preparation time on samples known to contain low levels of hazardous metals where only samples testing positive for the desired elements need to be analyzed…

A successful microscale fusion of semicarbazones, or transformation of carbonyl compounds into semicarbazones is performed through an effective grinding system. The donning of protective attire is advised to avoid the hazardous effects of semicarbazide hydrochloride during the fusion process.

Functional brain imaging has overshadowed traditional lesion studies in becoming the dominant approach to the study of brain-behavior relationships. The proponents of functional imaging studies frequently argue that this approach provides an advantage over lesion studies by observing normal brain activity in vivo without the disruptive effects of…

The Bureau of Labor Statistics (United States Department of Labor, Bureau of Labor Statistics [BLS], n.d.) has shown that workers involved in accidents have little, if any, instruction on the equipment they were using while injured. Keep in mind that instruction on the safe operation of a piece of equipment may take place early in the school year,…

The creative application of low-cost, readily available materials and techniques promotes inclusion and provides accessibility in the classroom and laboratory for students who are blind or have low vision. Difficulties encountered by these students include operation of laboratory equipment, execution of ordinary laboratory procedures, and use of…