This technical report documents the procedures used to collect and summarize data from the 2005 High School Transcript Study (HSTS 2005). The transcript studies serve as a barometer for changes in high school graduates' course-taking patterns; these patterns provide information about the rigor of high school curricula followed across the nation. Twenty-four appendixes are included: (1) Disclosure Notice; (2) 2005 HSTS School Information Form (SIF); (3) Transcript Request Form (TRF); (4) NAEP [National Assessment of Educational Progress] 2005 Administration Schedule; (5) Documentation of Missing Transcripts; (6) Summary of School Activities; (7) Letter to NAEP School Coordinator; (8) Transcript Format Checklist; (9) Course Catalog Checklist; (10) Shipping Transmittal Form--Phase 2; (11) School Background Questionnaire; (12) 2005 SD [Students with Disabilities] Questionnaire; (13) 2005 LEP [Students with Limited English Proficiency] Questionnaire; (14) Quality Checks for the HSTS Sample: Comparison of the Full HSTS School Sample to the Responding HSTS School Sample; (15) 2005 High School Transcript Study Classification of Secondary School Courses [CSSC] Hierarchical Listing and Detailed Stub List; (16) 2005 High School Transcript Study Codebook for Catalog File; (17) 2005 High School Transcript Study Codebook for Master CSSC File; (18) 2005 High School Transcript Study Codebook for NAEP Data File; (19) 2005 High School Transcript Study Codebook for School File; (20) 2005 High School Transcript Study Codebook for SD/LEP File; (21) 2005 High School Transcript Study Codebook for Student File; (22) 2005 High School Transcript Study Codebook for Tests and Honors File; (23) 2005 High School Transcript Study Codebook for Transcript File; and (24) HSTS 2005 User's Guide and Technical Documentation Glossary. (Contains 38 footnotes, 1 figure, and 20 tables.)