Based on the idea that reading instruction in science means teaching simultaneously the science content and the reading and reasoning processes by which that content is learned, this booklet offers practical and theoretical suggestions for science teachers to help students improve their content area comprehension. Chapters discuss the following areas: (1) learning from science text, (2) diagnosis in teaching science, (3) prereading strategies for teaching science, and (4) the use of guided materials in teaching science. The booklet also contains a statement on the need for collaboration between reading teachers and science teachers in the best interest of students. Appended are an informal study skills inventory on a physical science textbook and an essay for students on expanding their thinking abilities. (HTH)