Stomata are the pores on leaves through which carbon dioxide, oxygen, and water vapor are exchanged with the atmosphere. Researchers have found that leaf stomatal densities change in response to several environmental variables, including humidity, light intensity, and atmospheric levels of carbon dioxide, a greenhouse gas (Van Der Burgh, Dilcher,…

General education science teachers are meeting increasingly diverse classrooms of students that include students with disabilities. A one-week, summer, residential workshop was offered to interested science and special educators who worked through lab experiments one-on-one with students with physical or sensory disabilities (grades 7-12). To…

This study examined the effect of scaffolding learning components in a computerized environment, for students solving qualitative science problems in a simulation of laboratory experiments. Four scaffolding components were identified (structural, reflective, subject-matter and enrichment) and used in different configurations to construct four…

To demonstrate that properly designed laboratory instruction does provide affective and higher order learning benefits, an experiment was carried out in two replications. The subjects were 80 students enrolled in General Microbiology at Wallace Community College, Alabama. Students were randomly assigned to experimental and control groups. The…

A joint business-chemistry course which focuses on consumer testing is described. Guidelines for organizing the students into testing teams and suggested laboratory experiments are included. (DT)

REMEDIAL ENGLISH INSTRUCTIONAL METHODS FOR COLLEGE WERE COMPARED TO DETERMINE WHICH OF TWO APPROACHES PRODUCES THE GREATER AMOUNT OF MEASURABLE EDUCATIONAL RESULTS AND WHICH CONTRIBUTES TO GREATER PERSISTENCY OF ACQUIRED SKILLS IN WRITTEN AND SPOKEN ENGLISH. IN ADDITION, THE RELATIONSHIPS AMONG IMPROVEMENT AND PERSISTENCY OF IMPROVEMENT IN WRITTEN…

Brief suggestions for laboratory and classroom instruction in various chemistry topics are provided. (CP)

Contains contributed suggestions in the teaching of structure and bonding and reaction rates and equilibria in the Nuffield Advanced Chemistry Project. (CP)

Describes a variety of experiments that can be performed using the disposable syringe. Among others, these include the removal of oxygen during rusting, convection in a liquid and in air, gas collection in an electrolysis cell, small scale production of a fog, and hydrogen/oxygen extraction from a voltameter. (JR)

Describes a method utilized at Iowa State University for teaching a biochemistry laboratory course for non-majors involving the use of student independent projects and experimental choices. (BT)

Describes a simple apparatus for producing strip holograms with a number of slit-shaped exposures displaced along the vertical direction. The hologram maintains full horizontal parallax, but the slit aperture reduces the vertical viewing angle of the animated object. (Author/GA)

Hampshire College needed to create opportunities for advanced undergraduates to have extensive laboratory or field experience in experimental sciences. A general biochemistry course, taught almost entirely in the laboratory, is described. The focus of the course is enzymes as catalysts and as proteins. (MLW)

Shows that the mutual repulsion that enables a superconductor to levitate a magnet and a magnet to levitate a superconductor can be combined into a single demonstration. Uses an overhead projector, two pellets of "1-2-3" superconductor, Nd-Fe-B magnets, liquid nitrogen, and paraffin. Offers superconductor preparation, hazards, and disposal…

Described is a laboratory procedure for teaching seed stratification. Materials, methods, results, and applicability of the experiment are explained. Diagrams showing the percent of total germination as a function of stratification time and the germination rate of stratified seeds are included. (RT)

Presents a high school chemistry lab experiment using tin (II) chloride to explore the concepts of hydrolysis, Le Chatelier's principle, and electrolysis. Presents methodology and the chemistry involved. Offers questions for the students. (MVL)