Texas Instruments has undertaken a research program with the goal of producing scientifically-based evidence of the effectiveness of graphing calculators and the "TI-Navigator"[TM] classroom networking system in the context of a professional development and curriculum framework. The program includes a two-year longitudinal study. The research is conducted as a set of randomized experiments working with teachers of Algebra I and Geometry in the East Side Union High School (ESUHSD) and the San Diego City Schools (SDCS). This report addresses the findings from ESUHSD and SDCS for the first year of the two year study. The research measures the impact of important components of the Texas Instruments (TI) offering, in the context of a field experiment. The outcomes of interest are student on standardized tests of Algebra and Geometry. The results are measures of the incremental effect of introducing advanced TI products and services into textbook-based college preparatory Algebra I and Geometry instruction. The authors have analyzed the effect of each component as well as important interactions among the components and interactions between the components and characteristics of the student and teacher familiarity with the technology over time since the full impact of technology introduction may not be seen within a single academic year. This experiment in SDCS and ESUHSD will inform the current literature on the benefit of calculator use in Algebra I. Appended are: (1) East Side Surveys; (2) San Diego Surveys; (3) East Side Calculator System Use; (4) San Diego Calculator System Use; (5) East Side Materials; (6) San Diego Materials; (7) East Side Observation Protocol; (8) San Diego Observation Protocol; and (9) East Side and San Diego Interview Protocol. (Contains 62 figures, 94 tables, and 5 footnotes.)