The 10th grade, also known as sophomore year, is the second year of high school in the United States. Students typically range from 15 to 16 years old and are usually around halfway through their high school education. This year often includes core subjects such as math, science, English, and social studies, along with elective courses. In 10th grade, students may also take standardized tests like the PSAT to prepare for college admissions. This year is crucial for building a strong academic foundation, as grades can impact future opportunities, including college applications and scholarships.