The purpose of the study reported here was to explore the relationship between the type of high school attended (magnet versus comprehensive) and the likelihood of graduates having completed an advanced course, after accounting for students' prior achievement. In addition, the study examined the relationship between students' prior achievement and the likelihood of students completing an advanced course, and whether the nature of this relationship differs between different types of high schools. The REL West study team conducted a series of logistic regressions using records for 26,529 Clark County School District (CCSD) graduates from 43 high schools in 2011 and 2012. Student achievement prior to entering high school was measured using each student's grade 8 ELA and mathematics scores from Nevada's Criterion-Referenced Test (CRT). The results indicate that among students with similar levels of prior achievement, students have a greater likelihood of completing an honors English language arts course if they attend a magnet high school than if they attend a comprehensive high school, but there is no statistical difference between school types in the likelihood of students completing an honors mathematics course. Also, there is a stronger relationship between past achievement and the likelihood of completing an Advanced Placement course for students in the comprehensive high schools compared to those in magnet high schools. However, this was not the case for the relationship between past achievement and the likelihood of completing an honors course. Appended are: (1) Analytic Methods; (2) Logistic Regression Solutions for Fixed Effects; (3) Distribution of Graduates from Magnet and Comprehensive High Schools; and (4) Supplemental Analyses: Analytic Methods and Logistic Regression Solutions for Fixed Effects.