The Third Edition of The Stieglitz Informal Reading Inventory , known as the SIRI, continues to offer a simple and clear approach to reading assessment. This inventory can be used in a variety of educational settings allowing teachers with limited or no experience with informal reading inventories easily administer this instrument. Those with more experience can take advantage of the SIRI's numerous diagnostic options to examine specific reading behaviors in word recognition and comprehension. Section One provides an introduction to the SIRI. Section Two describes procedures for initial administration and scoring of the SIRI. The diagnostic options of the SIRI are presented in Section Three for the examiner who wishes to go beyond the initial administration and obtain additional information on students' reading behaviors. Section Four contains a collection of student test materials, and Section Five includes copies of forms needed to record the results. Finally, Section Six presents information and technical data on the development and validation of the SIRI. The SIRI reflects current views of the reading process.While it retains many standard IRI features such as graded passage and words in isolation tests, it also improves upon the traditional design of this instrument. Innovative features include a test for recognizing words in context, a dictated story strategy for assessing the reading behaviors of emergent readers, and procedures for determining the familiarity and interest level of selections read. A major goal in the development of the SIRI was to assemble expository and narrative material that younger and older students alike would enjoy reading without sacrificing the instrument's validity or efficiency.