The "3+1" model refers to a common educational structure where students take three core subjects along with one elective. This approach allows for a balanced curriculum, ensuring that students gain essential knowledge while also exploring personal interests. The core subjects typically include math, science, and language arts, while the elective can range from art to physical education. This model is often used in middle and high schools to promote a well-rounded education. By integrating an elective, students can develop skills in areas they are passionate about, fostering creativity and engagement in their learning experience.