This document outlines a study conducted to evaluate the effectiveness of using semantic mapping to teach vocabulary in high school English, government, and chemistry courses. The study found that semantic mapping significantly improved vocabulary scores on assessments and increased students' self-reported understanding and use of vocabulary words. However, observations revealed that students rarely applied vocabulary in class discussions. The study provided positive results but could be improved with a more standardized implementation across classes. Overall, semantic mapping shows promise as a vocabulary-building strategy for SAT preparation.