This data-rich report provides a detailed analysis of the performance of K-12 limited-English-proficient (LEP) students in bilingual and English-as-a-Second-Language (ESL) programs in public schools in Austin, Texas. Results are generally mixed. The report begins with an executive summary of major findings. Following are six sections covering various aspects of the process of evaluation: "Bilingual/ESL Programs: Evaluation 1998-99" covers the evaluation mandate, plan, overview, and program overview and transfers; "Description of LEP Population in AISD (Austin Independent School District)" details the ethnicity, languages spoken, language dominance, demographics, and growth in the AISD student population; "Findings--Academic Progress" provides test scores for various standardized tests including the Iowa Test of Basic Skills, Texas Test of Academic Skills (English and Spanish), English proficiency, and the number of exits; "Alternative Language Program Bilingual/ESL Professional Staff Development" details the staff training activities including the scope, distribution, and results; "Longitudinal Studies" provides a variety of longitudinal measurements of student performance; and the "Emergency Immigrant Education Program" is described. Thirty-five tables and 14 figures are included. (KFT)