The 7th grade midterm exam is typically taking place at the student's school. This is the standard location for such exams as they are usually administered within the educational institution where the student is enrolled. Schools are equipped with classrooms and testing facilities that ensure a conducive environment for students to take their exams.

The location of the exam is determined by the school's schedule and the specific arrangements made by the school administration. According to data from the National Center for Education Statistics (NCES), the majority of public schools in the United States conduct midterm exams during regular school hours within the school building. This is to ensure that students are not disrupted from their normal school routine and that the exams are conducted in a controlled setting.

Additionally, the American School Counselor Association (ASCA) recommends that schools provide a quiet, well-lit space for exams to minimize distractions and to ensure that students are able to concentrate on their work. The physical location within the school, such as a classroom or a designated testing center, is chosen based on these criteria. Furthermore, the ASCA also advises that schools consider the need for privacy and security when selecting a location for exams, which further supports the use of school facilities.

In conclusion, the 7th grade midterm exam is primarily taking place at the student's school due to the standard procedures and guidelines set forth by educational institutions and professional organizations. This ensures that the exams are conducted in a manner that is fair, consistent, and conducive to academic success.