Enzymes are nature's catalysts, mediating chemical processes in living systems. The study of enzyme function and mechanism includes defining the maximum catalytic rate and affinity for substrate/s (among other factors), referred to as enzyme kinetics. Enzyme kinetics is a staple of biochemistry curricula and other disciplines, from molecular and…

This guide is designed to help researchers make sure that their research reports include enough information about study measures so that readers can assess the quality of the study's methods and results. The guide also provides examples of write-ups about measures and suggests resources for learning more about these topics. The guide assumes…

The design and use of a chemistry practice exam instrument that includes a measure for student mental effort is described in this paper. Use of such an instrument can beneficial to chemistry students and chemistry educators as well as chemical education researchers from both a content and cognitive science perspective. The method for calculating…

A study was conducted on the enrollments of students (N=13,856) in first and second year science courses at Pima Community College, Arizona, over a 5-year preiod. Of those students who passed these courses with a C grade or better (N=5,974), frequency distributions by sex were made. It was found that the distribution of male/female registered as…

This research investigated the value students attached to the laboratory activities while studying physics using the learning cycle curriculum construction and teaching procedures. Among the procedures used to supply students laboratory data were video-taped demonstrations, "live" teacher demonstration, presenting data in written form…

Proposed is a more didactic version of the electronic periodic table than is being used. The background and use of the numeric system is detailed and illustrated. (CW)

Describes a field test and results of a new didactic teaching method involving resource-based learning to teach various aspects of mathematics and science (fractions, magnetism, planets) to elementary aged hearing impaired student in Iraq. The dramatic improvements in language for learners is described and implications of the methods are…

Examines teachers' differing uses of student-gathered data during science investigations. The results show that student language use and concept understanding differed between two different instructional approaches. Suggestions are provided for using student-gathered data in teaching elementary school science. (LZ)

Describes a study focusing on different presentation methods (pairs of students; entire class; and noncomputer list game-type setting) of a computer-based science simulation to sixth-grade students to determine the most beneficial method for student achievement. Results indicate large group instruction is slightly more beneficial. (MBR)

WICAT Systems, Inc., produced a "proof of concept" instructional videodisc in college biology with support from the National Science Foundation. The project involved simultaneous development of content design, instructional strategies, software, and hardware, with a principal focus on evaluation of the instructional videodisc in the classroom.…

Designed to evaluate the use of microcomputer-based labware (MBL) in junior high school science, the Computer as Lab Partner Project examined classroom experience of using MBL; system features used and curriculum designed; classroom procedures, processes, and interactions; gains and benefits of MBL use; and potential difficulties in MBL…

To detemine the effectiveness of the Individualized Audio-Tutorial (IAT) method of instruction, an IAT unit in biology was implemented in ninth grade classrooms in an urban school in Israel, and student achievement was measured in relation to gender, academic background in mathematics and biology, and IQ levels. The 180 subjects were randomly…

The purpose of this study was to examine how learners with different levels of prior understanding of a topic interact and learn from computer-assisted video instruction systems when they have control of content, sequence, pace, and mode of instruction. Based on pretest scores, 80 subjects were randomly selected, half with low prior conceptual…

This study of patterns of microcomputer-based instruction in elementary and secondary schools had three objectives: (1) to describe how teachers who were nominated by their peers as "unusually successful" in their microcomputer-based mathematics and science teaching use technology for instruction; (2) to describe how these uses vary as a…

Students make many choices over a long period, and choose a career through a complicated process. This process includes formal instruction in mathematics and science, and the opportunity for informal education in museums, science centers, and recreational programs. The influence of family, teachers, peers, and the electronic media can make an…