In this third volume of the United Nations Educational, Scientific and Cultural Organization's (UNESCO) series on "New Trends in Chemistry Teaching," a total of 29 papers originally published during the period from 1969 to 1971 in leading chemistry-teaching periodicals of the world is compiled for the purpose of promoting information exchange. The topics are related to the content, curricula, approaches, and techniques of chemistry teaching at all levels. Most lab-oriented articles are selected from material published by the UNESCO Science Teaching Project in Asia and of particular use to developing countries facing the problem of lacking apparatus and financial and technical assistance. The papers are written in either French or English and grouped into the following sections: the periodic table, bonds, and structures; energetics and kinetics; chemistry, industry, and the environment; nuclear science; selected topics; and source books. Separate introductions are written for each group of papers to make clear the significance of the papers within the group. Included in the appendices are an article on the new international table of atomic weights and a list of journals and periodicals of relevance to chemistry teaching. (CC)