Acknowledgments.- Preface.- Introduction.- 1. The Evolution of Instructional Leadership.- 2. The PIMRS Conceptual Framework.- 3. Development of the PIMRS Instrument.- 4. Reliability of the PIMRS.- 5. Validity of the PIMRS.- 6. Development of a PIMRS Teacher Short Form.- 7. Future Directions for Research on Instructional Leadership.- Endnotes.- References.- Appendices.- Index.