Jefferson High School is a public high school in Rockford, Illinois, that serves grades 9 through 12. It is one of six high schools in the Rockford School District 205. There are about 1,900 students at the school, and there is one teacher for every 18 students. This helps make the classroom a structured and student-centered place to learn. There are a lot of different kinds of students at the school, with about 82% of them coming from minority groups. This shows what the people who live near the school are like. There are a lot of academic and enrichment options at Jefferson High School. About 35% of students take Advanced Placement® classes and tests. There are also career and technical education classes, fine arts classes, sports, and student activities. The numbers show that in the 2025–2026 school year, about 2% of students will be good at math and 5% will be good at reading and writing. The school also lets students take the SAT and ACT as part of its planning for college readiness. Extracurricular activities, student services, and instructional programs are all paid for with public money.