Hypothesizes that overloading the working memory may leave no space for thought and organization such that faulty (or even no) learning takes place. Provides examples of this hypothesis and possible remedies. These remedies focus on design of laboratory manuals and equipment and on curriculum content order. (JN)

Reported are observational limits of detectability for several single stimulus and multi-stimuli observation tasks in secondary level chemistry. Provided are tables of actual results obtained including type of observation, chemical system used, method of determining stimulus magnitude, and observational thresholds. (Author/YP)

Discusses the selection of gloves for the chemistry laboratory. Provides checklists for the purposes of the gloves, and the factors including permeation rate, breakthrough time, friction, and cost. Lists eight rules for preventing skin exposure and minimizing area contamination. Lists six references. (YP)

Developed to increase student and teacher awareness of safe laboratory conditions, this guide provides information and suggestions for maintaining a safe laboratory environment. Section 1 contains a listing of potentially hazardous chemicals commonly used in secondary school science classes and section 2 lists potentially hazardous chemicals…

Reviews two textbooks: "Principles of Biochemistry" by Albert L. Lehninger and "Inorganic Chemistry, A Modern Introduction" by Therald Moeller. Also reviews text, study guide, and laboratory manual for Morris Hein's "Foundations of College Chemistry, Fifth Edition" and text/study guide for David A. Ucko's "Basics for Chemistry." (JN)

This document provides teachers with sources of useful information and new ideas about the high school chemistry laboratory program. Chapters included are: (1) "Introduction" describing the philosophy and specific objectives of this project; (2) "Importance of Laboratory Work"; (3) "Chemistry Lab Outline" listing…

Offers challenging work at a higher level of technique than most students meet in elementary laboratory work. Uses a combined weight and volumetric sequence not shown in textbooks. Notes modern rapid balances help lower evaporation loss during weighings. Discusses the balance, weights, and buoyancy considerations. (MVL)

Notes that this experiment takes safety and noncarcinogenic reactants into account. Demonstrates the use of diazonium salts for the replacement of an aromatic amine group by a phenolic hydroxyl. Involves two pleasant-smelling organic compounds, methyl anthranilate (grape) and methyl salicylate (oil of wintergreen). (MVL)

Describes several common synthetic organic transformations involving alkenes, alcohols, alkyl halides, and ketones. Includes concepts on kinetic versus thermodynamic control of reaction, rearrangement of a secondary carbocation to a tertiary cation, and the effect of the size of the base on orientation during elimination. (MVL)