Massachusetts policymakers recently expressed a desire to better understand Hispanic student achievement patterns in their state. Scores on the Massachusetts Comprehensive Assessment System (MCAS) tests have consistently revealed a gap in performance between Hispanic students and students from other subgroups, a gap corresponding to national trends. Yet studies that look closely at achievement in the national Hispanic student population are rare, and no previous analyses of Massachusetts data have been done for this subgroup. To reveal achievement patterns for the diverse group of Hispanic students in Massachusetts and to inform policy and program decisions, the Massachusetts Deputy Commissioner of Education and staff at the Massachusetts Department of Elementary and Secondary Education asked the Regional Educational Laboratory Northeast and Islands to analyze the scores of grade 10 Hispanic students on MCAS tests in English language arts and mathematics over 2002/03-2005/06. The department wished to learn about associations between the scores and school- and student-level characteristics, such as school attendance rate, English proficiency status, country of origin, first language, and school attended. The report compares the MCAS test performance of grade 10 Hispanic students with that of grade 10 non-Hispanic students over 2002/03-2005/06, looking at both English language arts and mathematics. Multilevel regressions are used to examine relationships between Hispanic students' MCAS test performance and student- and school-level characteristics. Five appendices are included: (1) Research on Hispanic students' academic achievement; (2) Study methods; (3) Data removal process for the descriptive analyses and multilevel regression modeling; (4) Characteristics of grade 10 Hispanic and non-Hispanic students in Massachusetts, 2002/03-2005/06; and (5) Multilevel regression modeling results. (Contains 30 tables, 3 figures, 4 boxes, and 3 notes.) [This report was prepared for the National Center for Education Evaluation and Regional Assistance, Institute of Education Sciences (IES) by Regional Educational Laboratory Northeast and Islands administered by Education Development Center, Inc. For the summary report, see ED505419.]