The main purpose of this study was to examine the effects of the Reading Apprenticeship professional development program on several teacher and student outcomes, including effects on student learning. A key part of the study was the use of an enhanced performance assessment program, the Integrated Learning Assessment (ILA), to measure student content understanding. The ILA instruments included multiple components that assessed student content knowledge, reading comprehension, metacognition, use of reading strategies, and writing skills in applied knowledge. An analysis of student scores using the ILA found little or no significant effects from the Reading Apprenticeship program on class-level student outcomes. However, the researchers found a significant positive effect on teachers' literacy instruction. Appendices include: (1) Biology ILA (Parts 1, 2, 3); (2) History ILA (Parts 1, 2, 3); (3) ILA Teacher Feedback Survey; (4) Metacognition Scoring Rubric; (5) Reading Strategies Scoring Rubric; (6) Writing Content Scoring Rubric; (7) Writing Language Scoring Rubric; (8) Writing Language Rubric Description; and (9) IRT-Based Analysis of Multiple Choice Tests of Content Knowledge. (Contains 28 tables, 5 figures and 6 footnotes.)