A study investigated the effects of training in the use of graphic organizers on the summarization strategies of disabled readers. Subjects, 21 disabled readers (with a mean age of 13 years, 7 months) from a reading clinic, received 5 hours of training in the use of graphic organizers to map expository passages. Instruction included training in text structure macrorules, modeling of the mapping procedure, and individual student practice with feedback on results. Posttest results indicated significant improvement in subjects' ability to identify levels of important ideas in text structure, to identify main idea statements, and to summarize expository text. (Forty references, one table of data, and a sample reading passage and student graphic organizer are attached.) (Author/RS)