Describes an experiment in which the incubation time to observe denitrification and other processes of the nitrogen cycle is reduced from 7-14 days to 24-48 hours. Presents calculations of processes in the nitrogen cycle in the form of a dichotomous key. (SAH)

Describes a safety program for teaching science. In the summer of 1999, specific Wisconsin safety laws, codes, and standards were researched and a training program including content, training sites, and dates was developed. One-day training programs were planned for six regions throughout the state. (SAH)

Describes an alternative to teaching ecology by using bacteria to test competitor survival. Students observe a time-dependent selective killing of other unrelated bacteria by Pseudomonas aeruginosa. (SAH)

Describes the inexpensive and safe method of using roundworms in the classroom or laboratories. Because parasitic infections are so common, students should learn about worms. Provides statistics on just how many people have a worm infection in the world. Explains how to study living nematodes, and obtain and use earthworms. (Contains 13…

Critiques Terrance Riley's "The Uncompromising Future of Writing Centers" and Stephen M. North's "Revisiting 'The Idea of a Writing Center'"--two articles that upset assumptions about writing centers. Suggests that while the vision of these writers may strike some as harsh, readers should turn toward rather than away from the important questions…

Describes the experiences of a first-year teacher who gave up a high-paying job in industry to teach laboratory technology. Includes excerpts from the journal she kept during her first few months of teaching. (JOW)

Presents teaching and learning strategies that can add to the aesthetic value of school labs and contribute to the ambiance of the workplace. (Author/JRH)

Electronics students (16 controls, 16 experimentals) designed, built, and tested an amplifier. The experimentals did so after it was designed through computer simulation (using Electronics Workbench software). The experimental group performed significantly better on problem-solving tests; both groups did the same on drill and practice tests. (SK)

Introduces a science laboratory integrating biology and chemistry courses that includes four modules: (1) the fundamental process of reactions; (2) a semester-long project on the chemical assay of ascorbic acid; (3) human metabolism of Vitamin C; and (4) an open-ended project on the manipulation of macromolecules. (YDS)

Presents a microbiology experiment on how to make soft pretzels with different flours and analyze the results using regression models. (Contains 12 references.) (ASK)

This paper describes the training of first-year students in technical skills by students in the second year of a laboratory course. The authors conclude that peer teaching is a very useful teaching method for reinforcing technical skills and providing better instructor-student ratios in the laboratory. (Author)

Discusses interactions between experimental systems and modes of interpretation. Uses the discovery of the 'base pairing principle' by Erwin Chargaff as an example to show how established laboratory routines and their development interact with the underlying theoretical framework and the 'Denkstil' (style of thought) of a collective of researchers…

Presents a case study in which an undergraduate student brings into a writing center a poor and partial draft of a research paper due the next morning. Gives an analysis of the case study "It's Due Tomorrow: Tutoring Under a Deadline" and presents a case study response entitled "Oh What a Difference a Deadline Makes - Or Does…

Introduces a chemical model illustrating the aspects of the second law of thermodynamics which explains concepts such as reversibility, path dependence, and extrapolation in terms of electrochemistry and calorimetry. Presents a thought experiment using an ideal galvanic electrochemical cell. (YDS)

Explains the reasons for allergies to latex gloves and includes suggestions for individuals at risk. (YDS)