This document presents the Maryland Collaborative for Teacher Preparation (MCTP) faculty's reviews on instructional issues of different disciplines. Contents include: (1) "The Maryland Collaborative for Teacher Preparation"; (2) "Guiding Principles: New Thinking in Mathematics and Science Teaching"; (3) "Introduction: Parallel Journeys of Risk and Reward" (Maureen B. Gardner); (4) "Elementary Geometry" (Karen Benbury); (5) "Interdisciplinary Science and Mathematics: Geometry and the Round Earth" (Kenneth Berg and James Fey); (6) "A Constructivist Approach to Plate Tectonics" (Rachel J. Burks); (7) "A Mathematical Modeling Course for Elementary Education Majors" (Don Cathcart and Tom Horseman); (8) "Adaptation of a Traditional Study of Enzyme Structure and Properties for the Constructivist Classroom" (Katherine J. Denniston and Joseph J. Topping); (9) "The Air We Breathe: Is Dilution the Solution to Pollution?" (Thomas C. O'Haver); (10) "Constructing the Stream Community: The Ecology of Flowing Waters" (Joanne Settel and Tom N. Hooe); (11) "The Challenge of Teaching Biology 100: Can I Really Promote Active Learning in a Large Lecture?" (Philip G. Sokolove); (12) "A Shift in Mathematics Teaching: Guiding Students to Become Independent Learners" (Richard C. Weimer, Karen Parks, and John Jones); and (13) "A Tale of Two Professors: Faculty Profiles." Appendices include: "References for Reading,""Highlights of National Recommendations," and "MCTP Advisors and Participants." (Contains 49 references.) (YDS)