An action research project described an implementation of vocabulary strategies designed to increase reading comprehension. The targeted population consisted of inner city elementary students located in central Illinois. Research shows that some children from low-income environments have below average reading abilities. Analysis of probable cause data revealed that students were failing to meet their optimal levels of reading performance. Students needed to increase the number of words that they read and understood automatically to increase reading comprehension. Prior knowledge and interest in the topic affects students' comprehension of the text. Difficult vocabulary affects reading comprehension. Some urban children lack reading materials that relate to their background. Failure in reading causes failure in school. A review of solution strategies suggested by experts, combined with an analysis of the problem setting, resulted in the selection of the following intervention: improving students' knowledge of vocabulary to increase reading comprehension by using graphs, charts, games, journals, and portfolios. (Contains 26 references and six charts and 12 graphs of data. Appendixes contain survey instruments, consent forms, and numerous pre and post tests.) (Author/RS)