Question: what age is intermediate school?
Answer: As an alternative to the middle school model, some secondary schools divided their grades into "junior high school" (years 7, 8, 9, and 10) and "senior high school" (years 11 and 12). Some have three levels, "junior" (years 7 and 8), "intermediate" (years 9 and 10), and "senior" (years 11 and 12).