Describes two classroom chemistry demonstrations which focus on the descriptive chemistry of bromine and iodine. Outlines the chemicals and equipment needed, experimental procedures, and discussion of one demonstration of the oxidation states of bromine and iodine, and another demonstration of the oxidation states of iodine. (TW)

Discusses the history of American science and science education, with particular emphasis on the development of scientific inquiry and experimentation. Focuses primarily on the activities of individuals in the 1800's, and the introduction of science into secondary schools and higher education institutions in the early 1900's. (TW)

Discusses the development of a student's ability to control experiments as an important aim of modern science curriculum materials. Argues that most curriculum developers offer only a simplistic method of controlling variables. Suggests ways to enhance the development of variable control within the framework of student experiments. (TW)

Describes a lesson in which fifth graders made observations of candles. Discusses the progress of the lesson and the necessity of instructing students in what and how to watch and measure. Stresses that this can be easily accomplished inexpensively with imagination. (CW)

Describes the rationale for using computer-assisted videodisc lessons to enhance introductory chemistry courses at University of Illinois, and presents sample lessons to illustrate what students see and do as they proceed through the lessons. Lesson construction and use are reviewed. (MBR)

Describes several laboratory experiments that are adaptations of clinical tests for certain genetic diseases in babies. Information and procedures are provided for tests for phenylketonuria (PKU), galactosemia, tyrosinemia, cystinuria, and mucopolysaccharidosis. Discusses the effects of each disease on the infants' development. (TW)

Describes a high school chemistry student's research project in which limonene was isolated from the oil of lemons and oranges. Outlines the students' tests on the use of this chemical as an insecticide. Discusses possible extensions of the exercises based on questions generated by the students. (TW)

Describes an experiment developed at Brooklyn College (New York) in which the preparation and ammonia analysis of an amminenickel(II) chloride is extended to include a spectrophotometric analysis for nickel. Discusses the materials needed and the procedure for the experiment which takes nine hours of laboratory work. (TW)

Desribes a chemistry course (taught in summer for graduate credit) for K-6 teachers to help promote teaching of chemistry as an experimental science at the elementary school level. Also describes another chemistry course for elementary school teachers, focusing on the laboratory component and experiments. (JN)

Describes 12 video films constituting the "What About" series of the Skills Essential to Learning project. Films begin with an introductory sequence showing a teenager using a particular science skill and concludes with a longer sequence showing a scientist using the same skill. Programs last 15 minutes and follow an identical format. (BC)

Discusses: (1) Brewster's angle in the elementary laboratory; (2) color mixing by computer; (3) computer iteration at A-level; (4) a simple probe for pressure measurement; (5) the measurement of distance using a laser; and (6) an activity on Archimede's principle. (JN)

Presents an approach that is used to introduce elementary and junior high students to a series of activities that will provide concrete experiences with acids, bases, and indicators. Provides instructions and listings of needed solutions and materials for developing this "magic sign" device. Includes background information and several…

Discusses consequences of using computer-assisted learning (CAL) packages for experiment planning in undergraduate physical chemistry laboratories and examines textbook presentations and syllabus criticism. An approach to syllabus reconstruction that combines operational research with experiences of CAL development program is demonstrated through…

Presents an experiment which links mass spectrometry to gas chromatography. Also presents a simulation of iron extraction using a ZX81 computer and discussions of Fehling versus Benedict's solutions, transition metal ammine complexes, electrochemical and other chemical series, and a simple model of dynamic equilibria. (JN)

A PET microcomputer is used as an accurate and programmable timer to support data acquisition from velocity experiments covering falling, rolling, and sliding objects, and human velocity, acceleration, and power measurements. The inexpensive instrumentation is simple and easy to use and compares favorably with conventional, more expensive…