Student achievement in web-based learning tools is assessed by using in-class examination, pretests, and posttests. The study reveals that using mastering chemistry web software in large-scale instruction provides an overall benefit to introductory chemistry students.

Discusses a method to solve problems in stoichiometry which can also be applied to other problems involving relationships between constituents in a chemical reaction. Students with little prior knowledge of chemistry can successfully use the method. (Author/SK)

Reaction stoichiometry calculations have always been difficult for students. Offers the use of a mole ratio flow chart (MRFC) as a logistical sequence of steps that incorporates molar proportions as alternative problem solving techniques to improve student understanding. Indicates that MRFC users performed as well on exam problems covering…

The abstract nature of the mole and its applications to problem solving make learning the concept difficult for students, and teaching the concept challenging for teachers. Presents activities that use concept maps and graphing calculators as tools for solving mole problems. (ASK)

Presents an activity that is suitable for a high school chemistry or introductory college chemistry lab in which students create their own Fizzie-style carbonated beverage and use stoichiometry to calculate the correct mix of citric acid and baking soda. (Author/ASK)

Describes a method for illustrating the particulate and dynamic nature of chemical reactions that uses cut-out circles on the overhead projector. (JRH)

Describes the use of Moe's Mall, a locational device designed to be used by learners, as a simple algorithm for solving mole-based exercises efficiently and accurately using dimensional analysis. (DDR)

Describes a sequential problem solving method for teaching stoichiometry to high school students. Provides several sample problems. (CS)

Discusses an alternate path to teaching introductory stoichiometry based on research findings. The recommendation is to use problems that can be solved easily by rapid mental calculation as well as by pure logic. (AIM)

Describes a variation of typical introductory chemistry stoichiometry experiments in which the reaction is run in a modified 20-ounce plastic soda bottle. (WRM)

We present an alternative to a traditional first-year chemistry laboratory experiment. This experiment has four key features: students utilize stoichiometry, learn and apply principles of green chemistry, engage in authentic scientific inquiry, and discover why each part of a scientific lab report is necessary. The importance and essential…

Presents calculations that suggest stoichiometric, ionic, and noble gas-metal compounds may be stable. Bases calculations on estimated values of electron affinity, anionic radius for the noble gases and for the Born exponents of resulting crystals. Suggests the desirability of experiments designed to prepare compounds containing anionic,…

Reviews identified learning problems dealing with stoichiometric calculations. Suggests solutions to these problems along with consequences for the curriculum. Includes remarks from a mathematics teacher concerning these problems. (DS)

Presents three problems based on the price of aluminum designed to encourage students to be cooperative and to use an investigative approach to learning. Students collect and synthesize information, analyze results, and draw conclusions. (AIM)

The performance of two groups of chemistry students, one taught using the traditional lecture method and the other interactive, in solving stoichiometry problems is described. The interactive instruction appears more effective for students who are less adept at information processing. The interaction apparently does not challenge better students,…