This bibliography presents 21 references and abstracts for improving mathematics instruction in two ways. The first aim is to serve as a guide in locating higher-order thinking skills material in mathematics; the second is to encourage the integration of higher-order thinking skills techniques into the mathematics curriculum. Entries are included that address instruction at the elementary, middle, and high school levels. Also addressed are instructional issues related to problem solving, cognitive science, computer-assisted instruction, and metacognition. (YP)